Digital Evidence & Discovery Center | Shield Public Safety Training
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Digital Evidence & Discovery Center

Practical guidance for collecting, preserving, reviewing, disclosing, and presenting digital evidence in an era of cloud platforms, connected vehicles, blockchain records, genetic genealogy, automated systems, artificial intelligence, and rapidly expanding data sources.

Begin an Evidence Integrity Review Explore the Evidence Lifecycle Open Discovery Checklist

Reviewed and updated September 3, 2026

Choose a pathway

What are you working on?

Start with the pathway that best matches your immediate task. Each tool produces an issue-spotting summary for operational or legal review.

⌕

I am handling evidence

Review source integrity, metadata, processing history, automated analysis, vendor data, and courtroom readiness.

Launch Integrity Review
⇄

I am preparing discovery

Identify preservation, disclosure, prosecutor-review, and vendor-record issues through a guided decision tree.

Launch Discovery Tool
✓

I am reviewing practices

Evaluate agency procedures for collection, retention, processing, disclosure, access controls, and supervision.

Interactive navigator

The digital evidence lifecycle

Select a stage to review the core documentation questions, common failure points, and operational considerations.

Evidence-type selector

What kind of evidence are you handling?

Select a category to see tailored preservation, authentication, discovery, vendor, provenance, and documentation considerations.

Signature tool

Evidence Integrity Review

Complete the review to generate an Evidence Integrity Profile identifying documentation gaps, preservation concerns, discovery issues, and recommended corrective actions.

Evidence Integrity Review

This assessment identifies process and documentation considerations. It does not determine admissibility or replace legal review.

A. Source and original evidence
B. Metadata and audit trail
C. Processing and automated analysis
D. Discovery and vendor information
E. Courtroom readiness
Core distinction

Original evidence and derivative material are not the same

Original or source evidence

  • Original video or audio file
  • Recorded interview
  • Native digital photograph
  • ALPR detection record
  • Mobile-device extraction
  • Original body-camera recording
  • Native vehicle telematics or infotainment export
  • Blockchain transaction record or provider return

Derivative or analytical material

  • Stabilized, enhanced, cropped, or annotated video
  • Automated transcript or translation
  • AI-generated summary
  • Investigative lead report
  • Analyst-created timeline
  • AI-edited or AI-generated report language
  • Blockchain analytics graph or attribution report
  • AI-assisted 911 transcript, translation, or summary
Operational principle: Derivative material may be highly useful, but it should not silently replace the underlying source evidence. Document what changed, who or what changed it, why it changed, and whether the result can be reproduced.
Guided issue spotting

Discovery Decision Tree

Answer the factual questions below. The tool will identify preservation, disclosure, vendor-record, documentation, and legal-review considerations.

Digital Evidence Discovery Review

How this tool works

Select every statement that applies to the evidence. Do not try to decide whether the item is legally discoverable. Simply identify the facts known to you.

When the review is complete, the tool will generate:

  • a Discovery Risk Level and Discovery Readiness Score;
  • preservation and vendor-data recommendations;
  • potential documentation gaps;
  • questions for prosecutors or agency counsel; and
  • a printable Discovery Review Report.
Estimated time: 2–4 minutes5 guided stepsPrintable report

Important: This tool is an issue-spotting and documentation aid. It does not determine discoverability, admissibility, possession, control, or legal compliance.

Preparation framework

Courtroom readiness checklist

A

Authenticity

What is it, where did it come from, how was it obtained, and who can establish that it accurately represents the relevant data or event?

I

Integrity

Was the original preserved? Is handling documented? Were alterations disclosed? Is the audit trail sufficient?

R

Reliability

How does the system work? What does it not establish? Was human review conducted? What limitations must be explained?

D

Disclosure

What was produced, when, in what format, with what metadata, and what additional records remain with a vendor or contractor?

Risk indicators

Common failure points

Original evidence overwrittenOnly an exported, compressed, edited, or redacted copy remains.
Metadata strippedEmail, conversion, download, or upload removes relevant metadata.
AI output treated as factA summary, transcript, alert, match, or classification is used without verification.
Vendor data overlookedThe visible result is retained, but logs, settings, searches, alternatives, or model information are not.
Processing undocumentedNo reliable record identifies who enhanced, cropped, converted, transcribed, or analyzed the material.
Exculpatory output discardedNegative searches, exclusions, failed processes, or conflicting results are not preserved.
Inference presented as source factA vendor label, identity match, blockchain cluster, AI summary, or genealogy hypothesis is presented without distinguishing the underlying evidence from the analytical inference.
Reference library

Legal and operational issues

These summaries are issue-spotting resources. Agency-specific legal advice should be obtained from the appropriate prosecutor or counsel.

Connected ShieldPST.ai resources

Continue the analysis

Move from evidence handling and discovery into the case law, technology, and governance resources that may shape agency practice.

Police Technology Case Law Index

Research 109 published case analyses by case name, legal issue, technology, and chronology.

Browse the 109-Case Library

Case Law & Police Technology Crosswalk

Connect 27 technology categories with the cases and constitutional doctrines most likely to affect their use.

Open the Crosswalk

Technology Explainers

Review plain-language operational and legal explainers across the expanded 39-explainer public-safety technology library.

Browse Technology Explainers

Connected Vehicles & Vehicle Telematics

Review infotainment, telematics, paired devices, OEM cloud records, event data, forensic acquisition, and discovery issues.

Open Connected Vehicles Explainer

Cryptocurrency & Blockchain Investigations

Review blockchain tracing, wallets, exchanges, attribution, analytics, seizure, evidentiary provenance, and discovery.

Open Cryptocurrency Explainer

Forensic Genetic Genealogy & Investigative DNA

Review SNP profiles, genealogy databases, family-tree analysis, discarded DNA, confirmation testing, evidence, and privacy.

Open Genetic Genealogy Explainer

AI-Assisted 911, Dispatch & Emergency Communications

Review transcription, translation, summarization, triage, dispatch support, QA, accessibility, evidence, and human review.

Open AI 911 Explainer

Technology Legal & Governance Map

Compare technologies across constitutional, privacy, evidentiary, procurement, policy, and governance domains.

Open the Governance Map

Fourth Amendment & Police Technology Timeline

Follow the development of search-and-seizure doctrine alongside changes in surveillance and digital technology.

Explore the Timeline

AI Governance & Policy

Apply lifecycle governance principles to agency adoption, use, review, documentation, and oversight of AI systems.

Explore AI Governance