Houston METRO police need your help apprehending a man who is punching people on a rail platform. According to surveillance video, a man walked up to a passenger who had just exited a train onto the platform at Main Street near Preston downtown and punched him in the face. The video then shows the same man punching another man as he gets onto the train from the same platform. METRO Police Chief Victor Rodriguez says he doesn’t think the attacks are related to the so-called “knockout game.” “A review of the tape does not indicate that anybody else is involved,”...