Police officers look at a car in which a man was found shot the head late Sunday night in the South Side's Avalon Park neighborhood.

Police officers look at a car in which a man was found shot the head late Sunday night in the South Side's Avalon Park neighborhood. (Adam Sege, Chicago Tribune / September 16, 2013)

A 31-year-old man has died after being shot in the South Side's Avalon Park neighborhood Sunday night, authorities said.

Brandon Williams, of the 8000 block of South Dante Avenue, was pronounced dead at 1:30 a.m. at John H. Stroger, Jr. Hospital of Cook County. He was rushed to Stroger late Sunday after someone shot him in the head in the 8000 block of South Woodlawn Avenue while he sat in a car, according to police.

An autopsy is scheduled for today.

No suspects were in custody as of this morning, police said. Area South detectives are investigating.

asege@tribune.com | Twitter: @AdamSege