Daryl Spencer Hart, the man accused of murdering his elderly neighbor inside her South Seattle home in 1984 has pleaded guilty.

From the PI.Com:

Daryl Spencer Hart was 25-years-old when, prosecutors argued, he sexually assaulted and killed Nora T. Gracey at her South Seattle home. Gracey's slaying remained unsolved for years, until a Seattle police cold case detective revisited it in 2007 and obtained a confession from Hart.

Gracey's body was discovered on Aug. 12, 1984, when Hart and his mother went to check on the elderly woman whom they had not seen for several days, according to police. Hart's mother later told officers she had lived next door to Gracey for 14 years and that they looked after each other.

The case went cold in the years that followed, Detective Mike Ciesynski said in court documents. State Patrol Crime Lab investigators processed the DNA recovered from Gracey's body, but no matches were found at the time.

Hart is scheduled to be sentenced next month.