Kristin Cavallari Monday thanked her fans for their outpour of concern over her missing brother Michael.
"I have such gratitude for those that have shared their support."
As RadarOnline.com previously reported, officials in Utah said that Michael was last seen publicly 11 days ago, on Nov. 27, on a gas station surveillance tape.
The San Clemente, California native's 2014 Honda Civic was found off Interstate 70 in Monticello, Utah still running, with a deployed airbag and showing damage from a rock, Grand County Sheriff Steven White told KSL.
"We're deeming it suspicious," White said, "but there's nothing to indicate anything one way or another."
Watch the video on RadarOnline.com
Michael is described as thin with brown hair and a beard, standing 5 foot 11; anyone with info on his whereabouts is asked to contact the Grand County Sheriff's Office at 435-259-8115.