Michael Cavallari's Body Found In Utah After Going Missing

Grand County, Utah authorities say they've found the body of 30-year-old Michael Cavallari, the brother of reality star Kristin Cavallari. 

Michael Cavallari had been missing since Thanksgiving, when a passerby found his car off a dirt road 200 miles outside Salt Lake City. The engine in the car was still running, and the airbag had been deployed. 

"The temperatures on the night of the incident were in the mid-to-low 20s. Very, very hostile conditions for somebody that was not properly equipped to be here, could be fatal," said Grand County, Utah Sheriff Steven White. 

Authorities said they later found Cavallari's body nearly 2 miles away from his car in a "steep and very rocky area." (Video via Grand County, Utah Sheriff's Office) 

Kristin Cavallari, who appeared in "Laguna Beach" and "The Hills," initially posted a photo of her and her brother on Instagram asking for "thoughts and prayers." After her brother's body was found, she posted this, "You had such a good heart and will be forever missed." Authorities in Utah have not named the cause of Cavallari's death. 

This video includes an image from Getty Images.