The Brief Police say five people beat and robbed a passenger on a CTA Red Line train Aug. 13. The robbery happened during the morning commute in the Loop. Detectives are asking for the public’s help identifying the suspects. Chicago police are asking for the public’s help in identifying five people who allegedly beat and robbed a passenger on a CTA Red Line train in the Loop last month. CTA beating, robbery suspects | CPDPolice said the victim was approached by five suspects who beat him before taking his property.