Police work a scene, Monday, Jan. 22, 2024, in Joliet, Ill., after multiple people were shot and killed over two days at three locations in the Chicago suburbs. (Tyler Pasciak LaRiviere / Chicago Sun-Times via AP)

Police in the city of Joliet and Will County said they did not know of a motive for the killings, but said the man knew the victims. The FBI’s fugitive task force was assisting local police in the search for the suspect, Joliet Police Chief William Evans said.

(Tony Webster / Wikimedia Commons)

Autopsies have determined that a Joliet man shot and killed his girlfriend and their two children before he fatally shot himself as police initially believed.

(Tony Webster / Wikimedia Commons)

The Joliet Police Department says in a statement that the four were found dead shortly after 10:15 p.m. Wednesday after officers responded to a report of a shooting.