MN Witness
Community evidence documentation for Minnesota. Pre-buffer recording captures what happened before you hit record.
Why this exists
When the FBI excluded the Minnesota BCA from investigating federal law enforcement incidents, the Hennepin County Attorney's Office launched a public evidence submission portal.
This app makes it easier for witnesses to capture more, preserve integrity, and submit securely.
Pre-Buffer
Captures 30-120 seconds before you hit record
Evidence-Grade
SHA-256 hash + GPS + timestamp at capture
Local-First
Your footage stays on your device until you decide
Try it now
Step 2: Open App
In Expo Go, tap "Enter URL manually" and paste:
exp://u.expo.dev/aaf9d973-108a-4e93-9a79-6126c96fd7b4?channel-name=previewDirect APK (Android)
Native build, no Play Store or Expo Go needed
Building...
TestFlight (iOS)
Native build with full background recording
Coming soon
Features
Pre-Buffer Recording
Continuously captures in background. When you hit record, you get what already happened plus forward.
Evidence Integrity
SHA-256 hash, GPS coordinates, timestamp, device info. Chain-of-custody ready.
Multiple Backup Paths
Google Drive, iCloud/Files share sheet, or your own server via webhook.
Know Your Rights
Minnesota-specific legal info. Recording rights, one-party consent, ICE encounters.
No Account Required
Works completely offline. No tracking, no analytics, no centralized storage.
Open Source
MIT licensed. Audit the code, fork it, contribute.
Resources
This app is not legal advice. Recording laws vary by jurisdiction. Minnesota is a one-party consent state for audio recording. You have a First Amendment right to record police in public. Consult an attorney for your specific situation.