GA Police: Deadly teen beating at party unprovoked

When the parents of the high school girl hosting the party asked everyone to leave Saturday night, the crowd spilled into the street.

That's when a fight broke out between two females and two males, and one of the females hit a guy, said Maj. Tommy Wheeler of the Douglas County Sheriff's Department. In a case of twisted chivalry, the man decided he would not retaliate - but vowed to beat up the next man who passed by, investigators said.

That's when 18-year-old Bobby Tillman happened to come upon the crowd. Authorities said four teenagers swiftly stomped, kicked and punched him to death while dozens of bystanders watched. All four were charged with murder Monday.

"He had nothing to do with anything," Maj. Tommy Wheeler of the Douglas County Sheriff's Department said of Tillman. "They just decided he's the one. And they killed him."