Police announced charges Thursday against Michael Gargiulo in connection to the August 14, 1993 murder of 18-year-old Tricia Pacaccio.
Pacaccio was stabbed in the chest as she was about to unlock the door to her family's home. Her father found her body hours later.
Cook County State's Attorney Anita Alvarez said Pacaccio was "violently stabbed and slain near the doorway of her family home just days before she was to start college."
Alvarez said the motive for the murder was unclear. Authorities say Gargiulo knew Pacaccio and was questioned about her death but never charged.
Gargiulo is already charged with murdering two women and an attempted murder on a third woman around the Los Angeles area.
Gargiulo used to live in the north suburbs.
Gargiulo pleaded not guilty in 2008 to the stabbing deaths of two women, including Ashley Ellerin, the ex-girlfriend of actor Ashton Kutcher. Kutcher, who is married to actress Demi Moore, told police he went to pick up 22-year-old Ellerin for a post-Grammy Awards party in 2001, but she didn't answer the door. He checked a back window and spotted what he thought were red wine stains on the carpet, and then left. Her body was discovered the next day by a friend. Kutcher was never considered a suspect.
The other victim is a Monterey Park, Calif., woman, Maria Bruno, who was stabbed to death in 2005.
Gargiulo is still awaiting trial in the two California murders, Alvarez said. He's been behind bars since July of 2008 after being charged with the April 28 knife attack of a Santa Monica, Calif., woman. In that case, authorities say DNA collected from the crime helped link Gargiulo to the other two California murders.