SYCAMORE, Ill. (AP) -- A northern Illinois man who is serving a 37-year prison sentence for killing a Northern Illinois University student says he wants his term overturned.
The Daily Chronicle reports 36-year-old William Curl filed the hand-written motion from Menard Correctional Center in July. He claims physical issues prevented him from understanding the plea agreement he accepted in April.
Curl is accused of killing freshman Antinette "Toni" Keller in October 2010. Her burned body was found in a park two days after she disappeared.
Curl also claims prosecutors threatened his son. Prosecutors say they're going to ask for more specifics regarding Curl's accusation. Prosecutors say Curl missed the deadline to file his appeal. Curl says he didn't have resource to file on time.
Curl is due in court again on Aug. 20.