Almost two years after his death, and with barely a peep from cops, they are out of patience and filed a $75,000 wrongful death lawsuit on Monday.
'[Presgrove] was beat to death by one or more of the defendants,' the lawsuit claimed, without specifying who they believed did it.
The lawsuit left open the possibility that the alleged beating wasn't meant to kill him, and included 'unidentified individuals' among the defendants.
'Either intentionally or accidentally, the defendants killed [Presgrove],' the lawsuit claimed.
'Although the death may have been unintended, hosting the party and beating of [Presgrove] was intentionally, malicious, and in reckless disregard of [his] rights.'
OHP didn't explicitly rule out manslaughter in its statement last year.
Presgrove's family insisted his death was 'not caused by being hit by a motor vehicle', an early explanation now thought to be unlikely by investigators.
The complaint named four of Presgrove's close friends who were at the party, one of their fathers, owners of the house, and a shop where they bought booze.
Presgrove's best friend Jack Newton and on-again, off-again girlfriend Carter Combs were two of the most prominent defendants in the lawsuit.
Jack was singled out as who allegedly bought the alcohol Presgrove drank, which the complaint argued made him partly culpable for his death.