TOULON — An inmate in the Stark County Jail was found unresponsive Friday and later pronounced dead at OSF HealthCare Saint Luke's Medical Center in Kewanee, according to a news release issued by the Illinois State Police on Saturday night.

The Stark County Sheriff's Office requested the Illinois State Police investigate the death, which occured at about 4:30 p.m. Friday. The inmate, identified as Sterling C. Williams Jr., 31, was alone in his cell when he was discovered.

The investigation is ongoing.