MOORHEAD — A warrant filed in Clay County Seventh District Court for the suspect in the death of a 14-year-old Moorhead girl earlier this week showed the two were quarreling over a recently-ended romantic relationship before he stabbed her multiple times. About 90 minutes later Walker's mother filed a missing person report with Moorhead police and directed officers to look for her daughter in a wooded area near a bike trail on Elm Street and Sixth Avenue using Snapchat location services. Officers found Walker's body in that location. There were "substantial sharp force injuries to her back, torso and neck,"...