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Why was a former Penn State football player killed? New details emerge

Friends and family of former Penn State quarterback and Philadelphia real estate developer Sean Schellenger mourned his death at a vigil on Sunday as police continue to investigate the events leading to his stabbing.

Schellenger, 37, was stabbed in the back by a man on a bike during a traffic incident at about 11 p.m. Thursday near Rittenhouse Square in Center City, according to the Associated Press.

Police reportedly found Schellenger, 37, lying in the street, bleeding heavily. He died at Jefferson University Hospital at about 11:20 p.m..

Michael White, a 20-year-old former Morgan State student and food delivery worker, turned himself into police peacefully Friday night.