The crash happened about 5:30 a.m. on southbound I-55 at Lemont Road. One of the motorists, Erick Raul Mota-Benitez, 28, of Crystal Lake, was pronounced dead at the scene, according to the DuPage County Coroner's office. Preliminary findings determined Mota-Benitez may have died from multiple traumatic injuries, the coroner's office said. Toxicology results are pending.
A representative from the Darien-Woodridge Fire District, which responded to the crash, referred all questions to state police.
Illinois State Police and the coroner's office are investigating. On Sunday, police said the wrong-way driver died in the accident. The person driving the other vehicle involved was taken to the hospital in critical condition. A red Chevy Blazer and white SUV were involved. Burned-out wreckage could be seen early Sunday near the median. There was one person in each vehicle, police said.
The Sun-Times Media Wire contributed to this report.