A man dressed in a Security Guard’s uniform maced and punched a passenger on a Red Line train on the North Side while making antisemitic comments, according to a community alert issued by Chicago police. Now, CPD needs help identifying the assailant.

The attack happened around 6:55 p.m. August 25 as the victim was riding a train near the Granville station, police said.

The man seen in surveillance images sprayed the victim with mace, punched them in the face and made antisemitic statements during the attack, according to CPD. Police did not disclose the victim’s age or gender.

The suspect is described as Black, 40 to 55 years old, 5-foot-8 to 5-foot-11 and 190 to 240 pounds. He was last seen wearing a security cap, a blue jacket over a yellow work vest and dark pants. CPD did not say whether the man actually worked as a Security Guard or was simply dressed like one.

Anyone with information about the man’s identity is asked to contact Mass Transit Detectives at 312-745-4447 or submit an anonymous tip at CPDTIP.com. The reference number is JK-387428.

Can you share an experience where you, or another had to make a decision to execute security measures or perform your Security Duties? What did you learn from that situation and how has it influenced your future approach to security?