Police are asking for your help in finding a man who hit a woman with a sock filled with feces.
The incident happened on an eastbound Blue Line train near Austin Blvd last week.
Police say the woman boarded the train at Oak Park Avenue.
When she arrived at the Austin stop, the man struck her with the sock filled with feces, then got off the train and ran away.
Police think photos captured by CTA cameras will help identify the suspect.