He said investigators are looking over hundreds of hours of security camera footage, and the Plainfield Fire Department dive team performed a search for items connected to the case. However, no results were found from that search.
Day was last seen in Bloomington in Aug. 24, and his car was found in Peru two days later. The body was discovered in the river on Sept. 4 and confirmed as Day's on Sept. 23.
Illinois State Police, Bloomington Police, Peru Police, the LaSalle County sheriff's and coroner's offices are assisting in the investigation, as is the FBI's Behavioral Analysis Unit, he said. Anyone with information on Day's death is asked to call 815-433-2161.
Diss and LaSalle County Coroner Richard Ploch did not respond to The Pantagraph's requests for comment Wednesday. Ploch's office previously told The Pantagraph that toxicology reports were still pending.
Illinois State University students at the Bone Student Center on Sept. 23 walk past a poster seeking the whereabouts of Jelani Day. The graduate student went missing nearly a month earlier, and his body was found Sept. 4 in the Illinois River in LaSalle County.