Jerry wants a body camera that he can wear all the time. It doesn't have to record all the time, but he'd like be able to turn it on as he needs. Leo says that he just got the Xiaomi YiCam 4K for $250. It has an LCD screen on the back to review footage on the fly.
Jerry can get a wide variety of mounts to put it just about anywhere. GoPro is another option, though it's a little more expensive. He can add a 200GB microSD card and at 720p he'll get 9.5 hours of recording time.