Sixty-three-year-old Billy Williams pleaded guilty Tuesday morning in the September 2008 slaying of Jane Morgan inside her apartment in Upper Darby, just outside Philadelphia. He was immediately sentenced to 30 to 60 years in prison.
Prosecutors say Williams' DNA was found under the victim's fingernails after she was discovered dead in her apartment when she failed to answer the door for friend.
Williams, who previously served time in a 1980 rape case, lived in the same apartment building and worked in its grocery store. He had been scheduled to go to trial in October.