What happened to Michael Cavallari and what were the circumstances of his death?

Michael Cavallari was found dead on December 10, 2015, nearly two weeks after being reported missing. His car was discovered in Utah with the engine running, but he was nowhere to be found. According to Kristin Cavallari, Michael had struggled with substance abuse and was driving from California to Chicago when he likely exited his vehicle and walked several miles away from it. His body was eventually located three miles from his abandoned car, with hypothermia listed as the official cause of death. Kristin later shared on her podcast 'Let's Be Honest' that Michael's substance abuse issues contributed to the circumstances leading to this tragic event.