By CBS 2 Chicago Staff

By Mary Chappell

Chicago (CBS) — Authorities are asking the public’s help in identifying a man who hit a person in the back of the head at the Argyle CTA Red Line Station last month.

(Credit: Chicago Police)

Police say the victim, a 30-year-old man, entered the station at about 1:18 p.m. Aug. 15 and was struck in the back of the head by the offender without provocation.

Police released the above surveillance image of the attacker and asked anybody with information to contact the Area Three Bureau of Detectives at (312) 744-8261.

CBS 2 Chicago Staff