A man was found dead in the Grand Crossing District police station lock-up early Monday on the South Side.

Shawn O. Brider, 48, was found unresponsive in the 3rd District lock-up about 12:15 a.m. at 7040 S. Cottage Grove Ave., according to Chicago Police and the Cook County medical examiner’s office. He was being held on a misdemeanor count of child endangerment.

Brider, a DeKalb resident, was pronounced dead at the scene at 12:29 a.m., authorities said. An autopsy Monday did not rule on his cause and manner of death, with results pending further investigation.

Area South detectives are also investigating.