Overview

• The appeal was issued Sept. 22 for an armed robbery that occurred at 1:15 a.m. on Aug. 30 at the Morgan Street Green/Pink Line platform in the 900 block of West Lake Street.
• Police released surveillance images captured on a Chicago Transit Authority train tied to the case.
• Investigators described four male suspects by clothing, including one in a black ski mask with a white T‑shirt and black jeans and another wearing black gym shoes with red laces.
• Anyone with information is asked to contact Public Transportation Detectives at 312-745-4447 or submit an anonymous tip at CPDTIP.com using reference RD JJ396124.
• The police alert did not provide additional details about the robbery.