Former Will County Sheriff Paul Kaupas suffered a heart attack Wednesday.
The Will County Sheriff's Office confirmed that Kaupas was in serious condition but had stabilized. There were no updates as of Thursday afternoon.
Kaupas retired in 2014 after serving as sheriff for 12 years and 43 years overall in law enforcement.
The Will County State's Attorney's Office released a statement from James Glasgow reacting to the news of Kaupas' condition.
"I’ve known Paul for almost 40 years," Glasgow said in the statement. "He is a loyal friend, he retired as a courageous and dedicated law enforcement officer, and, of course, he’s a marine through and through. As Paul would say, he will 'kick this heart attack’s ass.' Our prayers are with him."
Kaupas grew up in Chicago and fought as a Marine in Vietnam. He joined the Markham Police Department in 1971 before becoming a Will County sheriff's deputy in 1973.
Kaupas worked as a patrol deputy, on an undercover drug unit and was on the SWAT team for 20 years before becoming sheriff in 2002.
During his tenure as sheriff, Kaupas oversaw the expansion of the jail and the implementation of ranks and career paths for correctional officers assigned there.
Kaupas was succeeded by the current sheriff, Mike Kelley, after he retired in 2014.
When Kaupas retired, Kelley lauded his former boss' work to update the SWAT team's equipment and training during his administration.