Dallas police say they could conclude their domestic violence investigation of Cleveland Browns quarterback Johnny Manziel by late next week.<br />Police spokesman Maj. Midge Boyle said Saturday that investigators have reviewed medical records provided by Colleen Crowley, Manziel's ex-girlfriend.<br />Crowley told police Manziel hit her and dragged her into a car in late January.<br />Manziel hasn't been charged, but a judge has issued Crowley a protection order against him.<br />Police haven't interviewed Manziel, but spoke to several other witnesses.<br />Boyle says police want to have their strongest case against Manziel before speaking to him.
