Apple is developing software that can detect when iPhone owners are using their cameras and disable the function, a report last week discovered.

The technology would trigger an infrared sensor, like the kind that is often installed at concert venues, which would instruct the iPhone to shut off its camera. Apple filed the patent application 18 months ago in California, but only became public knowledge after the Daily Mail uncovered the documents.
Woman Arrested for Taping Police Cleared; Apple Wants "Kill Switch" for Camera Phones | Truthout

If cops are already prosecuting people for recording them as well as collecting and destroying bystander phones and then lying about it... I'm led to believe these will become standard issue for law-enforcement.