DNA has helped to crack a rape case in Yakima County that went cold. Yesterday 28-year-old David Endres, also know as David Workman, was sentenced to 13 years in prison for his third sex offense. He was convicted of second-degree rape following a jury trial last month. The 2005 case went cold after the victim was reluctant to talk. Endres was a high-risk level three sex offender when he committed the 2005 rape of a Montana woman in Yakima.