JOLIET, Ill. — An expert witness called to testify in the Christopher Vaughn case said Friday that blood stains on Vaughn's clothing and in the Ford Expedition where police found Vaughn's wife and three children dead yielded DNA matches in unexpected locations.

Kelly Krajnik, a forensic scientist specializing in biological and DNA testing for the Illinois State Police's Joliet crime lab, said blood that matched Christopher's DNA profile was found on the front passenger seat belt buckle where Kimberly was sitting. Conversely, blood matching Kimberly's DNA profile was found on the back of Christopher's black fleece jacket.

While the state is making the case Vaughn shot his wife and children before shooting himself and seeking help from a passerby on Interstate 55's west frontage road near Channahon in July 2007, Vaughn's attorney is claiming Kimberly shot her husband before committing murder-suicide.