What are the similarities?
Other than their cars being found in odd places, I can't think of many. But, there are details we don't know..common friends, some common bar/club. They both were out until late the previous evening. In the article it said clubs close at 2am and that would have been the latest Amber was out the night before at the club. We know HE had a date and last call was to room mate around 2/3 am. Where did she go on her date? A club? same club?
But no body, no obvious signs of attack being released. So her apartment, car and area near those places and PTL nothing. Polar opposite of attacking someone in broad daylight and leaving them beside the car.
Yet, it seems like there is more and it could be possible. Wasn't there a link to a rape also were the victim was beat around the head?
http://www.wistv.com/story/23764700/police-search-for-sexual-assault-suspect