In Taser’s cloud evidence system, which resides on Amazon.com’s cloud storage service, the videos can be tagged and labeled for record-keeping. The software has editing capabilities to protect the identities of some people captured on the video, like victims of child sex crimes or undercover officers. The video cannot be deleted while in the camera, though an officer can choose when to turn his camera on and off, something Mr. Smith does not think will happen often during confrontations because the videos could help clear law-abiding officers.