Though the motive behind University of Idaho killer Bryan Kohberger's violent attack remains unknown, the former police chief says "new information could come out still."

In the face of an unclear motive, those close to the case have responded by expressing anger at Bryan Kohberger, attempting to bargain with him or trying to grapple with the likelihood that they will never know why.

Bryan Kohberger confessed to the murders of four University of Idaho students in a plea deal, but Latah County Prosecutor Bill Thompson said there is still no evidence linking him to his victims