A brawl had broken out among the youths that turned on Mcknight-Hillman when he tried to intervene, Sheriff’s spokeswoman Joana Warren told the Times.
Authorities later arrived to find the man down, suffering from blunt-force trauma. He was rushed to a nearby hospital where he died, the Times reported.
Mcknight-Hillman’s job included overseeing the day-to-day care of the facility’s residents.
Authorities did not provide any other details and withheld the identities of the underage suspects.