Idaho student killings: suspect’s DNA allegedly matches knife sheath at scene

Authorities tested family's household trash for DNA and found match on knife sheath, court documents show

The suspect accused of murdering four University of Idaho students in their beds was linked to the slayings after authorities tested his family's household trash for DNA and found a match on a knife sheath at the scene, according to court documents released on Thursday.

The newly disclosed filing also portrays a chilling account of survival, with one roommate telling police that the mask-clad killer walked past her as he left.