Cops investigate possible assault involving Johnny Manziel & ex 02/01/2016 7:02 am PST Comments KDAF via KDAF: FORT WORTH, Tex. -- (KDAF) -- Oh, Johnny football! Will he ever learn? Yes, the Browns backup QB, known more for his off-field antics, than his game day drives, is at it again. This time, cops in both Big D and Cowtown are investigating a possible assault involving Johnny Manziel's 23-year-old ex-girlfriend. The incident happened overnight Saturday. Cops on both sides of the county line are still trying to sort out the details of the disturbance. FULL STORY: Cops investigate possible assault involving Johnny Manziel & ex - KDAF Waiting for your permission to load facebook comments.