Michael Cavallari reportedly died from hypothermia.<br />Kristin Cavallaris brothers death is ruled an accident as autopsy shows he died from hypothermia after crashing his car in freezing temperatures in rural Utah.<br />Its been a rough couple of months for Kristin Cavallari . Not only did the fashion designer and mother-of-three devastatingly lose her brother, Michael , in .<br />Kristin Cavallari is speaking out about her recent car accident and while she did not suffer serious injuries, she reveals a particularly heartbreaking aftereffect.
