The man accused of sexually assaulting and killing Northern Illinois University freshman Toni Keller on Tuesday was ordered to provide a DNA sample.
Prosecutors asked for William Curl's DNA to compare it to the blood found on shoes that are believed to have been worn by Keller's killer.
The shoes were found in a landfill following Curl's arrest.
Curl's DNA will be taken from a swab of Curl's cheek. Defense attorneys have consented to the test, court documents show.
Curl was arrested two weeks after Keller's Oct. 14 disappearance. On that date she left her residence hall to work on some art in a wooded area near campus.
That's when DeKalb police believe Curl, who was a frequent visitor to the park, attacked Keller. Police called it a "crime of opportunity."
Investigators said Curl fled to Mexico, and crossed the border back into the U.S., ending up in Covington, Louisiana where he was arrested at a hotel this week.
Neighbors in the DeKalb high-rise where Curl lived told the Daily Herald that he was a quite man who kept to himself, but "didn't come off as being strange."
