LOS ANGELES (AP) — Officers at thousands of law enforcement agencies are wearing tiny cameras to record their interactions with the public, but in many cases the devices are being rolled out faster than departments are able to create policies to govern their use.

And some rank-and-file officers are worried the technology might ultimately be used to derail their careers if, for example, an errant comment about a superior is captured on tape.

Most law enforcement leaders and civil liberties advocates believe the cameras will ultimately help officers because the devices give them a way to record events from their point of view at a time when citizens armed with cellphones are actively scrutinizing their every move.

They say, however, that the lack of clear guidelines on the cameras’ use could potentially undermine departments’ goals of creating greater accountability of officers and jeopardize the privacy of both the public and law enforcement officers.