Top 3 Findings

SST, Inc. aggregated the gunshot data from 62 ShotSpotter cities out of all those we monitor in the U.S.

-12.8%
  Top Finding #1

In the 46 cities where ShotSpotter data was analyzed for year over year trends, the overall median reduction in gunfire was 12.8%.

Data from the 46 cities where ShotSpotter® FlexSM was deployed during both years was used in this analysis.

Only cities that had
ShotSpotter Flex deployed for more than 4/5 of each year were included. If a city’s contracted coverage area expanded in 2015, the expanded area was not included in this comparison data.

Of the cities that saw reductions, the median decline was 20.1%. That comparison revealed 36,754 and 34,108, confirmed gunshot incidents (respectively). This increase in incidents was primarily due to an expansion in ShotSpotter coverage areas.


36
19
6
  78%, or 36 cities saw reductions in their rates of gunfire1,
41%, or 19 cities saw reductions greater than 20%,
13%, or 6 cities saw reductions greater than 33%.





Top Finding #2

Gunfire rates have decreased significantly on a per square mile basis in the Northeast and West census regions.

The gunfire incident rates per square mile decreased in every region of the country except for the Midwest.

The most significant percent decrease was seen in the Northeast, where ShotSpotter also has the largest coverage area.


 
7/sqmi





NGI 62 Cities
  Top Finding #3

We reviewed and published 54,699 separate gunfire incidents in 2015.

These total separate incidents add up to 150 incidents
of gunfire per day
or 6 incidents every hour.

Our analysis in this Index includes 62 ShotSpotter cities for full year data analysis. We also aggregated and compared gunshot data from 2015 vs. 2014 from
46 cities in the U.S.


 
143/Day
6/Hour




Gunfire Summary

The 2015 Gunfire Summary is based on gunfire data aggregated from 62 cities across the U.S. that had ShotSpotter Flex deployed for more than 4/5 of the year.

Incidents:
54,699/year
Shots Fired:
165,531/year
Busiest Day:
December 25: 266 incidents in total, 39 in one city.

Single busiest hour for a city:
2015
November 11: at 1:00 AM (24 incidents of gunfire)

 
Busiest hour of the week:
Saturday 2:00 AM – 3:00 AM (978 incidents)

Worst month for a city:
May 2015—422 incidents/square mile


2015




2014-2015 Gunfire Comparison per Square Mile

Gunfire rates have decreased significantly
on a per square mile basis in the Northeast and the West.

Overall, the cities in the Northeast region saw a 27.1% decline and those in the West experienced a 22% drop in gunfire incidents over the same time period. The median number of gunfire incidents dropped from 144.7 gunfire incidents per square mile in 2014 to 123.2 gunfire incidents per square mile in 2015.

The gunfire incident rates per square mile decreased in every region of the country except for the Midwest. The most significant percent decrease was seen in the Northeast, where ShotSpotter also has the largest coverage area.


 
23683-19443






XMas2015
  Holiday Gunfire Spotlight

Gunfire Incidents During Holiday Periods

In previous years, SST analysis shows that New Year’s Day, New Year’s Eve and Fourth of July are the days of the year with by far the highest rate of gunfire incidents.Gunfire during these holidays is considered "Celebratory gunfire" because the gunfire is typically celebratory in nature vs. gunfire with the intention to harm or intimidate. The SST analysis excludes New Year's Day, New Year's Eve and Fourth of July.

In 2015, Christmas day was the highest gunfire rate for a single normal day outside of New Year’s Eve, New Year’s Day and the 4th of July holiday period. In 2014, Christmas was among the highest gunfire rate for a single normal day outside of New Year’s Eve, New Year’s Day and the 4th of July holiday period.
City Spotlight

Congratulations to the 5 cities with the most significant decline in gunfire.

Huntington Station, NY: -50.2%
New Haven, CT: -38.5%
Brentwood, NY: -37.4%
Atlantic City, NJ: -35.4%
San Francisco, CA: -34.6%


Overall, the cities in the Northeast region saw a 27.1% decline and those in the West experienced a 22% drop in gunfire incidents over the same time period.

  • New Haven, CT

    We are tremendous believers in the ShotSpotter technology and look forward to expanding its use across New Haven.
    From 2011 to 2015, homicides are down 55% and non-fatal shootings are down 52%. When we first started using ShotSpotter we would never have imagined numbers like these, and while there are many reasons for these positive trends, ShotSpotter is an important part of the overall approach, enabling us to apply breakthrough technology to try and save lives and reduce crime in New Haven.

    -26.1%
    • Mayor Toni N. Harp
  • Atlantic City, NJ

    With ShotSpotter technology, our officers now respond faster to the scene and have been able to find victims and evidence quickly. ShotSpotter is also an important tool that helps with improved community action and engagement, and all of this has helped us to achieve a 35.4% decrease in gunfire violence from 2014 to 2015 across the city.
    Our goal is to do everything we can to catch the people who commit gun violence, and ShotSpotter is helping us do that.

    Ron Teachman
    • Chief Henry White
  • San Francisco, CA

    In San Francisco our focus has been on reducing gun violence and it appears that our efforts and community partnerships are having the desired effect.
    While there is no level of gun violence that is acceptable but we are headed in the right direction and we credit ShotSpotter with helping us achieve this.

    -39.8%
    • Chief Gregory Suhr
See all
  • New Haven, CT

    We are tremendous believers in the ShotSpotter technology and look forward to expanding its use across New Haven.
    From 2011 to 2015, homicides are down 55% and non-fatal shootings are down 52%. When we first started using ShotSpotter we would never have imagined numbers like these, and while there are many reasons for these positive trends, ShotSpotter is an important part of the overall approach, enabling us to apply breakthrough technology to try and save lives and reduce crime in New Haven.

    -26.1%
    • Mayor Toni N. Harp
  • Atlantic City, NJ

    With ShotSpotter technology, our officers now respond faster to the scene and have been able to find victims and evidence quickly. ShotSpotter is also an important tool that helps with improved community action and engagement, and all of this has helped us to achieve a 35.4% decrease in gunfire violence from 2014 to 2015 across the city.
    Our goal is to do everything we can to catch the people who commit gun violence, and ShotSpotter is helping us do that.

    Ron Teachman
    • Chief Henry White
  • San Francisco, CA

    In San Francisco our focus has been on reducing gun violence and it appears that our efforts and community partnerships are having the desired effect.
    While there is no level of gun violence that is acceptable but we are headed in the right direction and we credit ShotSpotter with helping us achieve this.

    -39.8%
    • Chief Gregory Suhr
Close
Communities Examined

SST’s 2015 gunfire summary is based on the following 62 cities:

Amityville, NY
Atlantic City, NJ
Baton Rouge, LA
Bayamon, PR
Bell Gardens, CA
Belle Glade, FL
Bellport, NY
Boston, MA
Brentwood, NY
Brockton, MA
Cambridge, MA
Camden, NJ
Canton, OH
Charlotte, NC
Chelsea, MA
Chicago, IL
Denver, CO
Detroit, MI
East Chicago, IN
East Palo Alto, CA
Everett, MA
  Northeast
Northeast
South
Caribbean
West
South
Northeast
Northeast
Northeast
Northeast
Northeast
Northeast
Midwest
South
Northeast
Midwest
West
Midwest
Midwest
West
Northeast
Fall River, MA
Glendale, AZ
Hartford, CT
Hempstead, NY
Huntington Station, NY
Jackson, MS
Kansas City, MO
Miami City, FL
Miami Gardens, FL
Milwaukee, WI
Minneapolis, MN
Montgomery, AL
New Bedford, MA
New Haven, CT
Oakland, CA
Omaha, NE
Paterson, NJ
Peoria, IL
Pittsburgh, PA
Plainfield, NJ
Revere, MA

  Northeast
West
Northeast
Northeast
Northeast
South
Midwest
South
South
Midwest
Midwest
South
Northeast
Northeast
West
Midwest
Northeast
Midwest
Northeast
Northeast
Northeast
Richmond, CA
Riviera Beach, FL
Rochester, NY
Rocky Mount, NC
San Francisco, CA
San Juan, PR
San Pablo, CA
Savannah, GA
Somerville, MA
South Bend, IN
Springfield, MA
St. Croix, USVI
St. Louis, MO
St. Thomas, USVI
Stockton, CA
Trujillo Alto, PR
Wilmington, DE
Wilmington, NC
Worcester, MA
Wyandanch, NY
  West
South
Northeast
South
West
Caribbean
West
South
Northeast
Midwest
Northeast
Caribbean
Midwest
Caribbean
West
Caribbean
South
South
Northeast
Northeast


At year end, ShotSpotter captured gunshot data on 292.7 square miles across America.



Communities Used in Comparison of 2015 and 2014

When comparing 2015 gunfire data to 2014 gunfire data, 46 cities where ShotSpotter Flex was deployed during both years were used in this analysis2. The 46 cities that make up the “apples to apples” comparison are:

Amityville, NY
Atlantic City, NJ
Baton Rouge, LA
Bayamon, PR
Bell Gardens, CA
Belle Glade, FL
Bellport, NY
Brentwood, NY
Brockton, MA
Camden, NJ
Canton, OH
Charlotte, NC
Chicago, IL
East Chicago, IN
East Palo Alto, CA
Fall River, MA

  Northeast
Northeast
South
Caribbean
West
South
Northeast
Northeast
Northeast
Northeast
Midwest
South
Midwest
Midwest
West
Northeast

Hartford, CT
Hempstead, NY
Huntington Station, NY
Jackson, MS
Kansas City, MO
Miami Gardens, FL
Milwaukee, WI
Minneapolis, MN
New Bedford, MA
New Haven, CT
Oakland, CA
Omaha, NE
Paterson, NJ
Peoria, IL
Plainfield, NJ
Richmond, CA

  Northeast
Northeast
Northeast
South
Midwest
South
Midwest
Midwest
Northeast
Northeast
West
Midwest
Northeast
Midwest
Northeast
West
Riviera Beach, FL
Rochester, NY
Rocky Mount, NC
San Francisco, CA
San Juan, PR
San Pablo, CA
South Bend, IN
Springfield, MA
St. Croix, USVI
St. Louis, MO
St. Thomas, USVI
Stockton, CA
Wilmington, NC
Wyandanch, NY
  South
Northeast
South
West
Caribbean
West
Midwest
Northeast
Caribbean
Midwest
Caribbean
West
South
Northeast




ShotSpotter Coverage Regions

Coverage areas are not evenly distributed across the country. To illustrate the variability in coverage area size, we grouped cities within the sample along the four U.S. Census “Regions.”

We added a single Caribbean region, for which the Census Bureau does not have a corresponding grouping, because the region constitutes a meaningful subset of ShotSpotter coverage areas.

At year end, ShotSpotter captured gunshot data on
292.7 square miles in cities across America.

2015 NGI Census Regions
1 Rate of gunfire = number of gunfire incidents per square mile, per year.
2 If a city was not using ShotSpotter Flex for more than 4/5 of either 2014 or 2015, that city was excluded from this analysis.
If a city’s contracted coverage area expanded in 2014, the expanded area was not included in this comparison data.

View previous years

2014NGI




2015NGI
Download the
National
Gunfire Index
2015 eBook

2014NGI
Download the
National
Gunfire Index 2014 eBook


2014NGI
Download the
National
Gunfire Index
2014


2013NGI Download the
National
Gunfire Index
2013




  • Copyright © 2016 SST, Inc.™ · All rights reserved.
  • Imprint
  • Privacy Policy
  • Methodology & Notes
  • Press Release
SST, Inc.™
7979 Gateway Boulevard
Suite 210
Newark, California 94560

+1.888.274.6877 | Toll Free
+1.510.794.3144 | General Information & Sales

info@ShotSpotter.com · www.ShotSpotter.com · www.ShotSpotter.com/blog
More Information about SST and ShotSpotter can be found at www.SST-Inc.com or www.ShotSpotter.com. The National Gunfire Index eBooks can be downloaded at www.ShotSpotter.com/ngi. You can also follow SST and ShotSpotter solutions on Twitter, YouTube, Facebook, and LinkedIn.

All rights reserved. ShotSpotter® Flex℠, ShotSpotter® SiteSecure™, ShotSpotter®, SST™ SecureCampus, and the ShotSpotter logo are registered trademarks of SST, Inc.™, SST and ShotSpotter technology are protected by one or more issued U.S. and foreign patents, with other domestic and foreign patents pending, as detailed at www.ShotSpotter.com/patents.
Leveraging Technology to produce Societal Benefits

As technology continues to advance, balancing its benefits against some of its inherent risks to privacy continues to be an issue which confronts us all. What’s true for technology in general is also the case in the realm of public safety. Technological advances have provided significant benefits to those tasked with keeping us safe while at the same time raising appropriate dialogue about how we can leverage those benefits while minimizing unwarranted intrusions on personal privacy.

Several police tools and technologies capture information that is already in public view: license plate readers, video cameras at stoplights and ATMs, combined video/audio surveillance cameras, facial recognition algorithms, etc. Unlike general audio and video surveillance devices, such as the tens of thousands of video cameras deployed in our nation’s cities which monitor general activities, gunshot detection technology is designed to trigger on loud explosive or impulsive sounds that may likely be gunfire and occur only rarely—and that the public already “hears”. Although courts have held that individuals speaking in a manner which can be overheard on public streets do not have the expectation of privacy which would trigger federal wiretapping laws, SST wants to provide stronger protection of individual rights to privacy than is strictly provided for by law. As a result, we developed, and recently strengthened, this privacy policy in order to exceed federal law requirements and to protect individual privacy.

Sensors
Please note: this section refers to the SST ShotSpotter outdoor gunfire detection technology. Indoor sensors are entirely different and provide additional privacy protections.

ShotSpotter sensors are specifically designed to be triggered by loud explosive or “impulsive” sounds only. The entire system is intentionally designed not to permit “live listening” of any sort. Human voices do not trigger ShotSpotter sensors. There are many other loud noises that do not trigger ShotSpotter: car doors slamming, people yelling “bang bang!”, loud music, airplane engines, leaf blowers, cheering, highway noise, car engines revving, drag races or tires squealing.

In addition, sensors are intentionally deployed in elevated locations (typically 50-100 feet above street level on building rooftops, sometimes 30-40 feet above ground on a street pole) for three reasons:
1) to maximize their ability to “listen to the horizon” and thereby reduce the number of sensors required;
2) to minimize the background noise from cars and other street noises, thus also reducing the number of sensors required; and
3) to minimize the chance that a human voice will be intelligible, however briefly, in order to protect privacy.

ShotSpotter sensors do not use “high gain,” directional, or other specialized microphones. The microphones themselves are similar to those in a mobile phone. When spoken outdoors at distances in excess of approximately 10 feet, a private conversation spoken in a normal voice is simply not intelligible to a human, to a mobile phone, or to ShotSpotter sensors. This is an intentional engineering and design choice made to ensure that ShotSpotter sensors cannot be used to monitor private conversations. It would be safe to say that an individual walking down the street and speaking into a mobile phone is more likely to unintentionally overhear and transmit the private conversation of someone else walking and talking nearby than that a ShotSpotter sensor, far further away, and only triggered by loud, impulsive noises, would be.

Incident Creation
When a loud explosive noise triggers a sensor, it instantly sends summary data about the acoustic event (e.g. time stamp, sensor location, amplitude and envelope characteristics, etc. but explicitly not the audio of the sound itself) to a centralized processor at our SST-operated data center. There, if no other sensors trigger (i.e., if only one sensor hears the particular impulse), nothing else happens and no incident is created. If multiple sensors (usually 3 or more) report impulsive noises within a narrow time window which are sufficiently loud and mathematically consistent with their having originated at a single location, software algorithms attempt to calculate that origin location. If an accurate location can be determined, the associated sensors’ data are aggregated (again, without the audio) and an incident is “created” in a centralized database. A second filter then applies artificial intelligence and statistical techniques to attempt to identify what type of sound originated at this location based on the measurements of the sound. In most cases, the parameters of the sound permit the incident to be filtered out, because it is, e.g., a pile driver or a jackhammer. In a percentage of cases, the characteristics of the sound are consistent with an explosion (gunfire, firework mortar, firecracker, backfire, etc.). In those cases, and only in those cases, the sensors are permitted to push a small snippet of audio to our data center. Otherwise, the audio will be flushed from the sensor’s buffer and lost permanently. This is an intentional privacy-driven design: an active step must be taken only in the context of an explosive triggering acoustic event, or the audio is erased and overwritten.

In those cases in which an explosive triggering acoustic event is detected and located, the brief audio snippets are sent to SST’s Real Time Incident Review Center (IRC) for analysis and alert qualification by highly trained experts in gunshot acoustics. Within seconds, SST’s IRC sends those qualified gunfire alerts directly to a dispatch center, PSAP, patrol officers or other agencies for an effective, coordinated response. The gunfire alerts that the ShotSpotter system delivers to our police agency clients provide a digital record of violent gun crimes in progress, including minimally brief snippets of audio recordings of those crimes. For any given illegal gunfire incident, that snippet can only contain a few seconds of audio before the first shot and after the last shot. The purpose of these short seconds of audio on either end of the gunshots is to allow a human reviewing in the incident to clearly tell when the shooting starts and stops, including judges and juries during possible future criminal proceedings.

No Live Audio Streaming
As mentioned above, the entire system is intentionally designed not to allow “live listening” of any sort. There is no “listen” button available to law enforcement, or to the staff of our Incident Review Center, except the buttons which replay the specific few seconds of incident audio surrounding an impulse noise determined to likely have originated from an explosive source.

No Private Conversations
ShotSpotter sensors do not have the ability to listen to indoor conversations. They do not have the ability to overhear normal speech or conversations on public streets. Recently, privacy zealots have pointed to three extremely rare “edge cases” (3 out of approximately 3 million incidents detected in the past 10 years), in which a human voice yelling loudly in a public street at the scene of a gunfire incident was overheard for a very brief period (a few seconds). They have inaccurately assumed that ShotSpotter sensors are constantly transmitting audio streams, or somehow have been reconfigured to listen to private conversations. That simply isn’t true. In one of these three cases, only two words were overheard; in the others, a sentence was heard before the gunshot and in the other a similar number of words were heard immediately after a gun shot. In all cases, the words were yelled loudly, in a public place, at the scene of a gunfire-related crime, and within a few seconds of that event.

Nonetheless, these rare cases caused SST to revisit our privacy policy and further tighten the parameters for audio availability: the permitted audio length is strictly limited to two seconds before and four seconds after. Unless someone is yelling loudly enough to be heard in public, and also doing so within two seconds before or four seconds after a loud, explosive acoustic incident, the audio will be flushed from the sensor’s buffer and overwritten. The simple fact is that there has never been a case of a private conversation overheard or monitored by any ShotSpotter sensor anywhere at any time. Period.

Policy and Security Minutiae
If you are still with us, here are some additional details: All servers and software used to process, store and protect data are managed and maintained by SST. Police agencies subscribe to the hosted service on an annual basis, radically streamlining the cost and complexity of using gunfire alert and analysis to enhance awareness, response and community safety. SST owns these data and does not release to anyone other than the customers under contract and according to the terms of that contract, thus further ensuring the safety and security of the data. Customers do not have administrative access to our servers, software, sensors, or any other means to circumvent SST’s security and privacy measures.

SST has taken appropriate security approaches to prevent anyone or any entity from gaining unauthorized access to our systems including our processors, networks or sensors. In addition to the fact that the system is designed not to permit live streaming audio, even if an intruder were to take control of our data center and network, they could not “make” a sensor deployed in the field stream audio. It simply isn’t possible: the sensors operate on a proprietary protocol and intentionally do not contain code which permits them to stream audio. Asymmetric key encryption is used to control access to sensors, and SST employees are required to use dual-factor authentication to gain access to most critical systems.

In the event that the ShotSpotter system fails to detect an incident, it is SST’s policy only to respond to requests for incident data or audio related to specific, verified gunfire incidents. In no event does incident audio extend beyond 2 seconds before and 4 seconds after an incident.

In addition to all of these technical and security measures taken to protect privacy and prevent misuse, SST has adopted a human resources policy to ensure that employees and contractors adhere to our privacy policies.

Summary
In the end, we believe that the privacy of our citizens and the community and social benefits of decreased gun violence are not at odds with each other. Our ultimate goal is to ensure that both are satisfied. We believe we have taken all reasonable and necessary precautions to assure a robust and strong privacy posture. We will continue to review, revise—and strengthen if necessary—these policies.
Methodology and Notes

1. The data in this Index is taken only from the areas covered by Shotspotter systems. There is no assurance that conclusions drawn from this data will be valid outside the coverage areas.

2. The 2015 analysis in this report is based on 62 communities that had Shotspotter Flex coverage (reviewed alerts) and were collecting data as of December 31, 2015.

3. In order to perform an apples-to-apples comparison of gunfire rates per square mile for 2014 and 2015, only those 46 communities that had Flex coverage for more than 4/5 of the non-holiday portion of the year in both 2014 and 2015 are used in the comparison.

4. Some communities were not covered during some parts of 2014 or 2015. Therefore, when calculating values such as gunfire incidents per square mile, care must be taken to account for the different number of days of coverage for different communities. The chosen solution was to calculate the number of incidents by day and impute the number of gunfire incidents for those days for which there was no coverage, taking into account known information about incident rates for the community, the day of the year, the day of the week, and the year. This method is like proration, but is more accurate. Imputation of incident data for a year is done only for communities that have coverage data for more than 4/5 of the non-holiday portion of that year.
This method was cross-checked using cities with two full years of data, comparing actual data to imputed values for simulated missing values. The average difference by city between the gunfire rates using imputed values vs. using actual values was only 2.2%, showing that imputation can be relied on to give accurate results.

5. Gunfire incidents for a year period were counted if the local time in the time zone of their occurrence was between 00:00:00 standard time (i.e., midnight) on January 1 and 23:59:59 on December 31st (i.e., 1 second before midnight on January 1).
Incidents during the holiday periods of New Years and 4th of July are not counted in the statistics unless explicitly noted because of the prevalence of celebratory gunfire during those holiday periods and the fact that it is highly inconsistent with the normal patterns. The holiday periods are from December 30, 2013 to January 2, 2014, December 30, 2014 to January 2, 2015, June 27 to July 9, 2014, and June 12 to July 12, 2015.

6. Communities without at least 20 incidents in all of 2014 were not used when comparing gunfire rates.

7. Incidents were counted only after formal qualification and operational use of ShotSpotter data by the client agency began, even if gunfire or other incidents were detected previously. Incidents were counted as gunfire if they were classified as Single Gunshot, Multiple Gunshot, or Possible Gunfire by SST-certified review personnel. All other incident types (fireworks, firecrackers, explosions unrelated to gunfire, transformer explosions, thunder, lightning, helicopters, etc.) were excluded from all statistics presented in this report. Gunfire incidents not reviewed by SST-certified review personnel are also excluded.
ShotSpotter data does not remain static, as information and adjustments are often made several days or weeks after initial detection (as forensic evidence is analyzed, cases are investigated, etc.). This report takes into account the most accurate and recently-available information.

8. Square mileage is measured on the basis of contractual coverage area. For each such area, the geographic area is defined as a polygon surrounding each coverage area. If the polygon coordinates are not available, the contracted area is used. In some cases, small areas within these coverage areas are intentionally excluded when gunfire is regularly expected in those specific locations (e.g. a legal outdoor shooting range or police practice range). In those cases, gunfire which takes place in those locations outside of authorized areas is still included in the tallies, but gunfire which takes place during permitted (expected) periods is not included.

9. When the Friday, Saturday and Sunday gunfire totals are compared to the rest of the week, a day is defined as starting at 06:00:00 local time and extending to 05:59:59 the next morning. For example, early 02:05 Sunday morning is counted as Saturday night.

10. Individual hours of the week and days of the week were calculated on a local time basis.
ShotSpotter Gunfire Index Release – 2016

NEW HAVEN, ATLANTIC CITY AND SAN FRANCISCO AMONG TOP FIVE U.S. CITIES WITH HIGHEST DECLINE
IN GUNFIRE FROM 2014 TO 2015 ACCORDING TO SST NATIONAL GUNFIRE INDEX

Northeast Tops the Nation with Biggest Decrease in Gunfire (-27.1%), Followed by the West (-22%)


NEWARK, California – February 26, 2016 – Gunfire incidents declined by a median of 12.8% in 2015 in key U.S. cities across the country—particularly in the northeast and west—according to the National Gunfire Index released today by SST, Inc. the global leader in gunfire detection and location technology. Among U.S. cities using SST’s ShotSpotter technology, three of the top five with the largest reduction in gunfire incidents from 2014 to 2015 were: New Haven, CT (- 38.5%), Atlantic City, NJ (- 35.3%), and San Francisco, CA (- 34.6%). Overall, the cities in the Northeast region saw a 27.1% decline and those in the West experienced a 22.0% drop in gunfire incidents over the same time period.

The annual ShotSpotter 2015 National Gunfire Index is based on data from a statistical sample of U.S. cities using ShotSpotter that had full year deployments in both 2014 and 2015. The year-over-year comparisons of 46 cities had a total coverage of 172.9 square miles and a median coverage area of 3.1 square miles. The median reduction in the rate of gunfire incidents in those cities was 12.8%. 36 of the 46 cities saw a decline with a median decrease of 20.1%.

KEY FINDINGS

SST’s National Gunfire Index delivers objective urban gunfire incident data that clearly demonstrates that gun violence in the U.S. is much greater than that which is typically measured in terms of homicides and non-fatal shootings alone.

• Total number of gunfire incidents in 2015 National Gunfire Index is 54,699.
• December 25, Christmas Day, was the most intense single day of gunfire incidents (excluding New Years Eve and Fourth of July) in 2015 with 266 incidents nationwide.
• The single busiest hour for gunfire activity during 2015 was Sunday, November 1 between 11:00 PM and midnight, when Kansas City, Missouri had 24 gunfire incidents.
• The most active day and hour of the week for all cities during 2015 was Saturday at 2:00 am.
• The highest rate of gunfire is in the Midwest with an average of 351.9 gunfire incidents per square mile during 2015 with the lowest rate in the Northeast with 73.7 incidents per square mile.
• Rounds per incident were up in all regions from a median of 3.5 in 2014 to 3.8 in 2015.
• In 2015, 29% of cities experienced five or more rounds of gunfire per incident, and 10% logged nine or more rounds per incident.
• There were 144.7 incidents per square mile in 2014 compared with 123.2 incidents per square mile in 2015.
• The top five cities with a decline in the 2015 National Gunfire Index also include New York cities Huntington Station (- 50.2%) and Brentwood (- 37.4%).

In the ten cities that saw an increase, three of those cities had slight increases of less than 2.5%; four cities experienced a “dead cat bounce” increase (where they saw significant decreases in the previous year’s gunfire index and this year saw an increase although still below their 2013 levels) and the remaining three cities saw increases which can be attributed to an uptick in local crime and in one case the non use of ShotSpotter.

PROVEN SUCCESS

“ShotSpotter is a proven gun violence detection tool as well as an objective thermometer measuring the inconvenient truth of urban gunfire in cities across the United States, from New York City to Sacramento. Our unique platform allows us to track the positive outcomes cities experience when leveraging ShotSpotter as part of a comprehensive gun violence abatement strategy,” said SST President and CEO Ralph A. Clark. “We believe this data can be constructive in not only shaping policy conversations, but also demonstrating what can be accomplished when law enforcement combines people; process and technology to better connect to and protect those communities challenged with gun violence.”

“In San Francisco our focus has been on reducing gun violence and it appears that our efforts and community partnerships are having the desired effect,” said San Francisco Police Chief Suhr. “While there is no level of gun violence that is acceptable; with that said, we are headed in the right direction and we credit ShotSpotter with helping us achieve this.”

“We are tremendous believers in the ShotSpotter technology and look forward to expanding its use across New Haven,” said New Haven Mayor Toni N. Harp. “From 2011 to 2015, homicides are down 55 percent and non-fatal shootings are down 52 percent. When we first started using ShotSpotter we would never have imagined numbers like these, and while there are many reasons for these positive trends, ShotSpotter is an important part of the overall approach, enabling us to apply breakthrough technology to try and save lives and reduce crime in New Haven.”

“With ShotSpotter technology, our officers now respond faster to the scene and have been able to find victims and evidence quickly. ShotSpotter is also an important tool that helps with improved community action and engagement, and all of this has helped us to achieve a 35.4 percent decrease in gunfire violence from 2014 to 2015 across the city,” said Atlantic City Police Chief Henry White. “Our goal is to do everything we can to catch the people who commit gun violence, and ShotSpotter is helping us do that.”

ABOUT ShotSpotter

ShotSpotter® Flex℠ helps local law enforcement agencies detect gunfire accurately, protect officers with increased tactical awareness, and connect the police to the community while also connecting police to their mission to serve and protect. With the precise location of illegal gunfire incidents, first responders can more quickly aid victims, collect evidence, and identify, investigate and ultimately apprehend armed, dangerous serial shooters.

ABOUT SST, INC.

SST, Inc. is the global leader in gunfire detection technology, providing the most trusted, scalable and reliable gunfire alert and analysis solutions available today. SST’s ShotSpotter Flex™ is the leading gunfire alert and analysis solution for detecting gunshots and providing critical intelligence to give law enforcement agencies the detailed real-time data needed to investigate, analyze and prosecute gun related crimes. SST’s ShotSpotter SiteSecure provides critical indoor/outdoor infrastructure protection against active shooter attacks. The company’s deep domain experience of twenty years, intellectual property including 33 issued patents, along with cumulative agency best practice experience, enables measurable outcomes that contribute to reducing gun violence. SST is a proven solution provider with more than 90 installations across the United States and the world. Privately held, the company’s collective inspiration is sourced from our founder’s core belief that the highest and best use of technology is when it can serve a public good. Details can be found at www.ShotSpotter.com. Details about our U.S. and foreign patents can be found at www.ShotSpotter.com/patents.

More Information about SST and ShotSpotter can be found at www.SST-Inc.com or www.ShotSpotter.com. The National Gunfire Index eBooks can be downloaded at www.ShotSpotter.com/ngi. You can also follow SST and ShotSpotter solutions on Twitter, YouTube, Facebook, and LinkedIn.

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Media Contact: Liz Einbinder +1 (415) 577-8255 leinbinder@ShotSpotter.com