A YouTube video was passed around recently showing a trucker "pulling over" a policeman for speeding and using his cell phone. The trucker recorded his interaction with the officer, which changed fairly radically once the officer realized he was being recorded. At the end of the video, the trucker, Brian Miner, says, "And that's what happens when they know you're recording."
This sort of interaction can't actually legally occur in every U.S. state. Some states require both parties to consent to such a recording. Here in Texas, we're a "one party consent" state. To find out what that means, and the circumstances and manner under which you can and cannot record conversations in Texas, we talk with University of Houston Law Professor Peter Linzer.