High priority · Reliability and investigatory stops

3.310: ShotSpotter Response Technology

Acoustic gunshot-detection response. Portions of the document discussed previously were redacted. One sentence was identified and is not verified.

Last reviewed: unverifiedSource verified: noPolicy version: February 2020, not confirmedLegal review: unverified

Editorial disclaimer

This website presents public-interest research and legal analysis. Identifying a potential constitutional challenge does not establish that an officer, agency, or vendor violated the law. Constitutional concerns are research questions, not findings of unlawful conduct. The legality of a practice depends on the governing law, precise policy language, and facts of implementation. Statutes and precedents can change. Review the underlying records.

This page keeps four things separate: what the policy says, the legal standard, a potential challenge, and the proof required.

What the policy says

Research summary, not a quotation.

Version identified as February 2020. That date is not confirmed against the source PDF.

Portions were redacted in the PDF discussed previously. Redacted text is not inferred.

Policy language previously identified
Each ShotSpotter event should be considered an illegal shooting until proven otherwise.
Not verified against the source PDF. No page number. Do not treat this as a confirmed quotation.
The identified sentence is a response posture. It is not, by itself, legal authority to detain or search someone.

Constitutional provisions implicated in this review: Fourth Amendment, Fourteenth Amendment.

Potential challenges

Alert treated as a proved shooting

Policy-language concernApplication-dependent

Editorial research status. Not a court finding.

Potential challenge

The phrase "until proven otherwise" risks conflating an investigative assumption with the government's burden of proof. Constitutional infringement would require evidence of an improper stop, search, seizure, or prosecution. Do not assert that every ShotSpotter alert is unconstitutional.

Legal standard

Terry v. Ohio, 392 U.S. 1 (1968), requires reasonable suspicion for a brief stop. Illinois v. Wardlow, 528 U.S. 119 (2000), uses the totality of the circumstances. Florida v. J.L., 529 U.S. 266 (2000), holds an unreliable tip insufficient on the facts presented. Brady v. Maryland, 373 U.S. 83 (1963), addresses material exculpatory evidence. Daubert v. Merrell Dow Pharmaceuticals, 509 U.S. 579 (1993), addresses expert reliability in federal proceedings. No link was supplied for Daubert.

Proof required

Alert accuracy and false-positive statistics
Vendor agreements
Event-level audit trails and analyst edits
Dispatch protocols
Incident-to-arrest outcomes
Evidence-disclosure practices

Evidence status. This concern is not confirmed evidence of unlawful conduct.

Governing cases

Open a case for the relevance noted in the research file. A link appears only when one was supplied.

Terry v. Ohio, 392 U.S. 1 (1968)

Brief investigative stops require reasonable, articulable suspicion.

Read the opinion

Illinois v. Wardlow, 528 U.S. 119 (2000)

Totality of the circumstances for reasonable suspicion.

No source link was supplied for this citation.

Florida v. J.L., 529 U.S. 266 (2000)

Anonymous firearm tip alone insufficient on the facts presented.

Read the opinion

Brady v. Maryland, 373 U.S. 83 (1963)

Disclosure of material exculpatory evidence.

Read the opinion

Daubert v. Merrell Dow Pharmaceuticals, 509 U.S. 579 (1993)

Expert reliability in federal proceedings.

No source link was supplied for this citation.

Nevada statutes

No Nevada statute was cited for this policy in the research file.

Unanswered questions

Questions in the research file

Fourth Amendment. Does an acoustic alert, standing alone, establish reasonable suspicion of a particular person or vehicle? That depends on the alert's reliability and surrounding facts.
Probable cause. Does the department treat an automated detection as sufficient to justify a search, arrest, or entry without independently satisfying the applicable legal standard?
Due process and evidentiary reliability. Are false positives, vendor revisions, human review, and exculpatory material preserved and disclosed when relevant?

Still unanswered

The identified sentence has not been checked against the original PDF.
No page number is available.
Redacted passages were not reinspected and are not described.

Source

Source PDF not attached

The source PDF is not attached. This page does not link to a file. Exact wording and page numbers were not rechecked against the original.

Last reviewed: unverified
Source verified: no
Policy version: February 2020
Legal review: unverified
Effective date: Not verified
Version identified: February 2020. Not confirmed against the source PDF.