Microphone. it could be the radio microphone that he uses but usually those are triggered by pressing them on or off. this could be just a lapel microphone that was active while he was going through the traffic pullover. >> just through your experience does this kind of dash cam video really help in court? >> oh, gosh. it could and it could not depending what the goals of the attorneys are. >> thank you so much for joining me this morning. i really appreciate it. we couldn't help but notice the music playing during that dash cam video. listen. ♪ ♪ >> all right. so in case you're wonderin...