Investigators are trying to piece together what happened to the brother of reality star Kristin Cavallari, who hasn't been heard from since his car was found abandoned more than a week ago near a remote dirt road in Utah.
Michael Cavallari, 30, lives in Southern California and was arrested on an allegation of making threats there Nov. 23, authorities said Monday. He's the brother-in-law of Chicago Bears quarterback Jay Cutler, who married Kristin Cavallari in 2013. His car was found empty and still running four days later.
According to a police report, Michael Cavallari was arrested outside California's Dana Point City Hall with a loaded shotgun after a woman called the sheriff's department to say Michael Cavallari had been outside her apartment with a gun.
The unnamed woman told deputies the two had argued days earlier, and she was afraid because he kept returning to her apartment. Police reported smelling alcohol on Michael Cavallari's breath when he was arrested. He acknowledged having a loaded shotgun in his trunk, the report said.
He was taken into custody without incident, and he denied doing anything to the woman, who reported the incidents to authorities. Orange County Sheriff's Lt. Jeffrey Hallock said Monday that Michael Cavallari bailed out of jail Nov. 25.
Four days later, a rancher found Michael Cavallari's car in Utah with its engine running and the air bag deployed, Grand County Sheriff Steven White said. It was about 200 miles south of Salt Lake City and five miles south of Interstate 70, in a part of the state that's home to several national parks.
Cavallari apparently was driving by himself, though it's unclear where he was going, authorities said. Evidence shows Michael Cavallari's 2014 Honda Civic hit a couple big rocks and washes, likely causing the air bag to deploy, according to White.
White said crews have been searching the area on foot and by helicopter but have found no trace of Michael Cavallari. It's difficult to find footprints in the frozen ground, he added. Temperatures in the area have been at or below freezing every night since the car was found up against a small embankment.
There were no signs of foul play.
Hours before his Honda was discovered, Michael Cavallari stopped at a convenience store about 60 miles away and asked for directions to Salt Lake City. Credit card transactions and surveillance video from the store show he was in the town of Monticello at 3:30 a.m. on Nov. 27.
Michael Cavallari works for his father's corporation, White said. He is single and has no kids.
His sister, Kristin, rose to fame in the mid-2000s when she appeared in the MTV reality series "Laguna Beach" and "The Hills." She and Cutler have three children together.
On Monday, Kristin Cavallari posted a photo on Instagram of her and her brother as kids at the beach with a message thanking people for their thoughts and prayers.
"We remain hopeful and I will share any news that we receive," she wrote.
Cutler was a star player at Vanderbilt University and now plays for the Chicago Bears in the NFL. The 32-year-old said little Sunday when asked about whether the situation with his missing brother-in-law was a factor in his team's loss.
"No," Cutler said. "We stayed focused, and we adjust better than anybody."
Cutler's head coach, John Fox, said Monday he's aware of the situation but doesn't know much about it. Fox said the franchise provides resources for players to deal with off-field issues, including sports psychologists.
The Cavallari family asked authorities to respect their privacy in the first days after Michael Cavallari disappeared. They decided allow police to go public this weekend in hopes that somebody might come forward with more information, White said.
Michael Cavallari's father and stepfather have been in Utah to help with the search, the sheriff said.
Police are gearing up to launch new searches but are first strategizing the best areas to look. People recreate at sand dunes in the area, and White said he's hopeful someone who was there knows something.