Sargeant was at Acacia Avenue and Cherrywood Drive in East Hemet when the attack happened Monday, according to the Riverside County Sheriff's Department:
First-responders were sent to the location at 4:45 p.m. and put Sargeant in a helicopter so he could be rushed to a hospital, sheriff's officials said.
At first he was listed in critical-but-stable condition, authorities said: But he didn't make it, succumbing to his injuries about 10:15 that night.
According to a sheriff's statement ...
... Witnesses at the scene stated they saw three or four ... male juveniles dressed in dark clothing assault the victim and flee through a vacant field northwest of the location.
They're looking for witnesses or anyone with inside information about the crime. Call detectives at 760-393-3500.