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Redaction for Evidence

One incident produces footage from several cameras, a dispatch recording and a report, and all of it is potentially releasable. Volume is the constraint, not difficulty.

ONE INCIDENT, FOUR SOURCES {''.join(f'' f'{cam}' f'' f'' f'' f'{lbl}' for i,(cam,lbl) in enumerate([("BODY-WORN 01","PLATE"),("DASHCAM 04","PLATE"),("CCTV LOBBY","SCREEN"),("CCTV DOOR","PLATE")]))} DISPATCH AUDIO {''.join(f'' for i,h in enumerate([7,13,19,11,23,9,17,21,13,7,15,25,11,19,23,9,21,15,7,17,13,23,11,19,9,15,21,7,13,25,17,11,23,15,9,19,13,7,21,15]))}

Challenges

What These Share

A face is an object across time, not a box on a frame

At 30 frames per second a minute of footage is 1,800 decisions about the same person. Detection runs per frame and tracking carries the mask through movement, turning away and re-entry.

The backlog is the problem

Queue-based bulk processing runs the same policy across a folder of files, permissioned per format, rather than one operator opening one file at a time.

Custody has to hold from ingest to release

Roughly 36 event types are recorded, with the user, their email address, the IP address they acted from and the timestamp on each.

It often cannot leave the network

Criminal-justice material is routinely subject to a boundary requirement, which is why the entire AI stack runs on-premises or air-gapped when it has to.

From Ingest to Release

01

Ingest

Footage, dispatch audio and stills from every camera on the incident land in one place, hashed on arrival so integrity can be shown later.

02

Detect and track

Faces, licence plates, weapons, screens and street signs are detected per frame, and tracking carries each mask through movement, occlusion and re-entry.

03

Review

An operator scrubs the timeline, corrects a tracked object where it drifts, and adds anything the model did not raise.

04

Apply

Blur, pixelate or solid fill is burned into a new rendition, with the exemption drawn onto the mask where the release requires one.

05

Release

The redacted copy goes out and the original stays, because an appeal against a withholding is decided against the unredacted record.

Where This Fits

Most evidence work is video, and video redaction covers tracking, 360 degree footage and the formats body-worn and in-car systems produce. Dispatch and interview audio is audio redaction. Automation and scale covers queue-based bulk processing for a backlog, and deployment covers running the whole stack inside your own network when criminal-justice policy requires it.

Send Us an Hour of Footage

We will redact it and show you the custody trail alongside the output.