From Poynter:

A recent Gizmodo story, “Are Cameras the New Guns?,” created quite a stir in journalism circles recently. Gizmodo found that there appears to be an increase in the number of citizens arrested for filming abuse by police, or just police in action: “In response to a flood of Facebook and YouTube videos that depict police abuse, a new trend in law enforcement is gaining popularity. In at least three states, it is now illegal to record any on-duty police officer. “Even if the encounter involves you and may be necessary to your defense, and even if the recording is on a public street where no expectation of privacy exists. Read more
here…