It may be a while before anyone knows what killed a Highland, Illinois teen found unresponsive in a friend's dorm room at the University of Missouri Sunday morning.
University Police say emergency crews arrived about 9:00 a.m. to find 18 year old Gregory Holthaus unconscious and not breathing. He was rushed to University Hospital where he was pronounced dead.
Police don't suspect foul play, but a cause of death has not yet been determined. The investigation is ongoing.
Friends and family held a memorial service for Holthaus at the Highland town square Sunday evening.