THE BRONX - Investigators are determining whether two parking lot attendants will be charged in the death of a Truman High School football star. Police say Isayah Muller was stabbed to death Tuesday after his father, Andre Muller, allegedly started an altercation with the pair of attendants after his son's graduation. Andre Muller is accused of hitting one attendant over the head with a shovel, and his son was knifed when he tried to intervene. Investigators are looking through surveillance footage to learn more from the fight, which reportedly broke out over a stolen graduation gift. Detectives and the Bronx District Attorney's Office have yet to decide whether Andre Muller will be indicted, and whether either of the attendants will be charged.The attendants' whereabouts are currently unknown.Dad pleads not guilty in brawl that killed football player sonTruman H.S. football star killed hours after graduationFriends, teammates gather to remember slain football star