The Cook County sheriff's office says a man has been arrested for a 1984 rape.
Officials say 47-year-old Manuel Acosta was living in Oak Lawn under the alias Manuel Soto Galvan. He was arrested on Saturday and is being held without bond in the Cook County jail.
Acosta was one of three men accused of sexually assaulting a woman in a van in Chicago in 1984. A warrant was issued for his arrest in June 1985, but he was not found.
Members of the Sheriff's Central Warrant Unit recently learned that Acosta was using an alias, authorities said.
The other two men being sought in the case are 56-year-old Jose Contreas and 48-year-old Amancio Salinas.
Sheriff Tom Dart is asking anyone with information on their whereabouts to contact his department.