Police said the man requested a cigarette from a woman near the Fullerton Red Line stop in the 900-block of West Fullerton Avenue at about 7:25 a.m. on August 10. The man then grabbed the woman and sexually abused her, police said.
The suspect is described by police as about 5'9", 21-25 years old and was wearing a blue light winter jacket and acid wash jeans.
Anyone with information is asked to contact Area Three detectives at (312) 744-8261.