(MCT) — The Cook County sheriff's office is one step closer to searching a Northwest Side apartment building where serial killer John Wayne Gacy may have buried bodies or other evidence, a sheriff's spokesman said today.

The Cook County state's attorney's office gave its approval late Friday to the sheriff's office's request to obtain a search warrant for the apartment building in the 6100 block of West Miami Avenue, where Gacy's mother once lived and Gacy once worked as a maintenance employee, sheriff's spokesman Frank Bilecki said.