Dustin McCowan, the 18-year-old taken into custody during Saturday’s home Indiana U. football game, has been charged with murdering 19-year-old northwest Indiana resident Amanda Bach.

McCowan was taken into custody near McNutt Quad on Saturday after the IU Police Department was notified of his location via police scanner. At the time, Porter County authorities considered McCowan a person of interest in the case.

McCowan was transported to Porter County, questioned and held in the Porter County Jail. He was formally charged with Bach’s murder Monday afternoon.

He is the last known person to have seen Bach alive, according to local authorities. Police described him as Bach’s acquaintance.

Porter County police called Bach’s parents at 3:45 a.m. Friday after finding her car abandoned with a flat tire in a rural drug store parking lot. Her purse was still in the car.

Bach’s parents told police they last saw their daughter at 10 p.m. Thursday and she missed her 1 a.m. curfew.

After local residents and police conducted a search of the area surrounding her abandoned car, they discovered her body Saturday afternoon.

Bach was a 2011 graduate of Portage High School and planned to attend IU-Northwest in spring 2012.