The black ex-con father of a high school football star killed in a graduation day fight with two parking attendants triggered the tragic, deadly brawl

Isayah Muller, 19, was stabbed to death by one of the attendants his dad accused of stealing a graduation gift from the family car - a $200 bottle of cologne. Security cameras captured part of the violence at the M.T. Jerome Town Corp. lot in the Bronx, a prosecutor said. The video shows Andre Muller, 40, bashing one of the workers, Ramon Hernandez, with a snow shovel he picked up at the lot. The video also shows the younger Muller throwing punches, but not being stabbed, the prosecutor said. "What a tragedy. [Andre] Muller was the aggressor," Police Commissioner Raymond Kelly said. Hernandez, who needed 10 stitches to close a gash in his arm, and his colleague, were released without being charged, a police spokesman said. Andre Muller, wearing a bloody blue shirt, was arraigned in Bronx Criminal Court on charges of assault, menacing, harassment and criminal possession of a weapon - the snow shovel. The drama unfolded shortly after Isayah Muller's commencement at Lehman College. A standout running back, Isayah led the Truman High School Mustangs to their first-ever PSAL Bowl title in November 2010. He planned to attend Nassau Community College in Fall 2011. The family initially left the parking lot and drove to City Island for a celebratory dinner. As Isayah Muller dined on his favorite shrimp dish, his father noticed the cologne he bought his son missing from a pile of gifts. He and his family immediately drove back to the parking lot, where the deadly confrontation ensued. The workers retreated from the shovel-wielding dad, whose lengthy rap sheet includes separate prison stints for heroin dealing and robbery. The attendants locked themselves in the parking lot's shack, but Isayah Muller busted through the door. The unidentified worker plunged a homemade shank into the teen's chest and side. Andre Muller drove him to a nearby clinic. An ambulance rushed the son to St. Barnabas Hospital, where he died.