[thaumasiotes]

> People might believe lots of things the first few thousand times, but eventually it will make the officer look pretty bad if they walked into an adverse situation without their documentation device running.

This isn't some hypothetical about the future. What you describe is very common today, with no loss of credibility having attached to the police.

[maxerickson]

No, I'm pretty sure police don't have universal access to (reliable, effective) recording devices.

I'm also pretty sure that large segments of the population don't trust them at all.