If a police officer is doing something that would be sensible to record and for some reason chooses to leave the camera off, you eventually learn something. I say eventually because the flexibility could be used for abuse, saying "I forgot" and "technical problems", but not over and over and over again.
I don't think a police officer needs a great deal of privacy while on duty, but I also don't mind giving them the ability to turn off recording devices when they use the toilet. I mean turn it off independently, without asking some overseer for permission.
Controlling the circumstances under which recordings are viewed or released is important to consider as well. The way I see it there are two circumstances for viewing these recordings:
- Internal to law enforcement as part of performance review or incident investigation.
- Requested by the public in regard to a specific incident.
Since the police are wearing a uniform, an integrated camera might be better.
There is something to be said for power of the first-person view however. Maybe a more "police-ish" looking Glass?