Portland police change policy on DNA evidence

Sexual assualt backlogUntil this year, Portland police did not routinely present DNA evidence obtained from all rape cases to the state crime lab.
But as detectives struggled to solve the Dec. 13 rape and killing of 14-year-old Melissa Bittler and pored through old sexual assault cases, they found more than 1,000 rape kits that never had been submitted and recognized a need for new protocol.