Dan Davis went missing on Nov. 25 after being involved in a car crash near 119th Street and Avers Avenue in unincorporated Alsip.
His family thinks he may have had a stroke or other medical episode prior to the crash.
On Monday, his body was found in the 3300-Wireton Road in Blue Island, according to the medical examiner.
"Three and a half months of agony has finally come to a close. As of yesterday afternoon, my dad was located, but is no longer with us," his daughter Wendy Davis said in a social media post.
"I don't have many words right now besides thank you. The virality of dad's case is something none of us expected. The support from millions of people across the whole world carried our spirits high throughout these last few months. Without you, we would be nowhere," she said.
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The Cook County Sheriff's Office released body cam video that shows Davis getting out of a police vehicle around 12:30 a.m. on Nov. 25.
He was dropped off at the bar where he worked, 115 Bourbon Street in Merrionette Park.