William Curl, 34, is accused of sexually assaulting and killing 18-year-old Antinette "Toni" Keller of southwest suburban Plainfield. She disappeared in October after telling friends she was going for a walk in Prairie Park in DeKalb, Ill.
Burned remains were later found in the park, and Keller's cell phone and clothes were nearby.
In court Tuesday morning, Curl's attorney agreed to a request by prosecutors for a DNA sample to compare with substances found on a pair of Curl's shoes.
