BEAVERCREEK, Ohio (AP) — In a recent Ohio case and others, cameras meant to catch bad guys are capturing attention for footage of police using force. Those images might increase transparency, but they come with a risk that viewers might rush to judgment.

Ohio State University criminal law professor Ric Simmons says viewers may think they know what happened once they see actual footage, but video often doesn’t tell the whole story.

The family of a man fatally shot by police in an Ohio Wal-Mart says soundless surveillance video shows officers’ actions were unreasonable. But a prosecutor cited the same video to explain the shooting was justified.

In South Carolina, a trooper’s dashboard video, with audio, showed an unarmed driver being shot. The trooper has been fired and charged with assault.