ShotSpotter Under a Federally Funded Evaluation
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
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✎ Updated 20 Aug 2026 Publication date recorded for 4 sources. What changed →
Kansas City has run ShotSpotter acoustic gunshot detection since 2012, covering about 3.5 square miles on the east side of Troost Avenue, and it is one of only two American deployments examined in depth from outside: a National Institute of Justice-funded evaluation led by Eric Piza used over 15 years of data from Chicago and Kansas City, comparing ShotSpotter target areas with similar control areas not covered, and reported through five peer-reviewed journal articles. The department that operates the sensors is not run by the city: since 1939 Kansas City's police have answered to a Board of Police Commissioners whose members are appointed by the governor of Missouri, with the mayor as the fifth commissioner. The police department took over the funding in 2017 and has spent a total of $1.3 million on it, renewing most recently at nearly $200,000 for a one-year term.
what does this mean?
The strongest source behind this entry is an independent peer-reviewed or academic study. It grades who did the looking — not how well the project went. All four grades →📊 Impact
The evaluation found the technology does what it detects and not what it was bought for. In Kansas City ShotSpotter alerts went off 93 seconds before the first 911 call reporting the same incident on average, nearly 12% of the overall police response, EMS response and hospital transport travel times, and the collection of ballistic evidence and recovery of firearms was substantially higher in the ShotSpotter target area than the controls. But in both Chicago and Kansas City, ShotSpotter did not reduce the occurrence of fatal shootings, nonfatal shootings or other violent felonies committed with firearms, and did not increase the clearance rates for either. Alerts were 15% more likely than 911 calls to be classified as unfounded.
🎓 Lesson
This is the best-evidenced piece of technology in the atlas's gunshot-detection family, and the contract was renewed anyway — which is not hypocrisy so much as a different reading of what the money buys. The study settles the purchase question: faster arrival and better evidence at the scene, not fewer people shot.
Sources
📅 How old is the evidence?
Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 2012. 4 of 4 sources carry a publication date, from 1 January 2023 to 29 July 2024.
When the sources were published
- National Institute of Justice (NIJ) · national governmentNational Institute of Justice — The Impact of Gunshot Detection Technology on Gun Violence in Kansas City and Chicago: A Multi-Pronged Evaluation
- KCUR · pressKCUR — When did Kansas City police come under state control?
- KCUR · pressKCUR — ShotSpotter gunshot detection system fails to reduce violent crime in Kansas City, study says
- The Conversation · pressThe Conversation — Eric Piza on studying ShotSpotter in Chicago and Kansas City · updated 30 December 2024
What happened to this record
- Entered the record
- Sources last read
- Publication date recorded for 4 sources
Show your work What this page rests on and what it can’t tell you · all 9 claims with their sources · the forensic record
Evidence Passport · public beta 9 addressable claims, 4 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.
Inspect the claims, one by one — verbatim text, sources and caveats for all 9
The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.
clm-fc16f031042d4a0a
quantitative
Kansas City has run ShotSpotter acoustic gunshot detection since 2012, covering about 3.5 square miles on the east side of Troost Avenue
Sources carrying this claim
clm-95fb6cb04956379e
quantitative
used over 15 years of data from Chicago and Kansas City, comparing ShotSpotter target areas with similar control areas not covered
Sources carrying this claim
clm-2318fe82a5f0b731
descriptive
reported through five peer-reviewed journal articles
Sources carrying this claim
clm-8cbcd0fcf61cb831
quantitative
since 1939 Kansas City's police have answered to a Board of Police Commissioners whose members are appointed by the governor of Missouri, with the mayor as the fifth commissioner
Sources carrying this claim
clm-6e933454a37e9da4
quantitative
The police department took over the funding in 2017 and has spent a total of $1.3 million on it, renewing most recently at nearly $200,000 for a one-year term
Sources carrying this claim
clm-f579a96a19506dba
quantitative
In Kansas City ShotSpotter alerts went off 93 seconds before the first 911 call reporting the same incident on average, nearly 12% of the overall police response, EMS response and hospital transport travel times
Sources carrying this claim
clm-9f812de33ba6d19c
descriptive
the collection of ballistic evidence and recovery of firearms was substantially higher in the ShotSpotter target area than the controls
Sources carrying this claim
clm-87f440c322114c83
descriptive
in both Chicago and Kansas City, ShotSpotter did not reduce the occurrence of fatal shootings, nonfatal shootings or other violent felonies committed with firearms, and did not increase the clearance rates for either
Sources carrying this claim
clm-eed8039c16157848
quantitative
Alerts were 15% more likely than 911 calls to be classified as unfounded
Sources carrying this claim
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders
This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:70876ddbf030bf74dbc91ee672f13b56578da8d9b7476bec7ac3199b7151b477
- 9
- of 9 claims mapped
- 4
- source dossiers
- 4
- publication dates recorded
- 0
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Governance facts carried by the record
- Operator
- Kansas City, Missouri Police Department, under a Board of Police Commissioners appointed by the Governor of Missouri; sensors supplied by SoundThinking (formerly ShotSpotter)
- Actor types
- regional-government, national-government, research
- Funding model
- public
- Funding description
- Kansas City Police Department budget since 2017; previously federally supported
- Cost
- Not recorded
- Ownership
- Not recorded
- Decision rights
- Not recorded
- Exit conditions
- Not recorded
4 source dossiers
The Conversation — Eric Piza on studying ShotSpotter in Chicago and Kansas City
- Stable source ID
src-22d31562f409d2ea- Publisher
- Name not classified · theconversation.com
- Type / language
- web-page · language not classified
- Published
- 2024-07-29
- Updated
- 2024-12-30
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-19
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Written by the principal investigator, summarising the findings of the peer-reviewed articles.
National Institute of Justice — The Impact of Gunshot Detection Technology on Gun Violence in Kansas City and Chicago: A Multi-Pronged Evaluation
- Stable source ID
src-e94b7add9160654d- Publisher
- Name not classified · nij.ojp.gov
- Type / language
- web-page · language not classified
- Published
- 2023-01-01
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-19
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- No locator recordedDescriptive only — not page/paragraph exact
- Claims linked
KCUR — ShotSpotter gunshot detection system fails to reduce violent crime in Kansas City, study says
- Stable source ID
src-13e71bdef6657083- Publisher
- Name not classified · kcur.org
- Type / language
- web-page · language not classified
- Published
- 2023-11-28
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-19
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- No locator recordedDescriptive only — not page/paragraph exact
- Claims linked
KCUR — When did Kansas City police come under state control?
- Stable source ID
src-0c8b40610416d45e- Publisher
- Name not classified · kcur.org
- Type / language
- web-page · language not classified
- Published
- 2023-01-03
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-19
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- No locator recordedDescriptive only — not page/paragraph exact
- Claims linked
Known limits of this passport
- Publisher names and source languages have not yet been classified; domains are recorded without guessing.
- Existing source notes are descriptive locators, not page- or paragraph-exact citations.
- A missing archive, publication date or content hash is shown as null rather than inferred.
- The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.
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📎 Cite this project
1001 Smart Cities (2026). “ShotSpotter Under a Federally Funded Evaluation” — Kansas City, United States. The Smart City Atlas. https://1001smartcities.org/projects/kansas-city-shotspotter/ (last verified 2026-08-19). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.