Teen accused of murdering sleeping friend pleads guilty

SEATTLE -- A teenager accused of strangling and stabbing his friend as she slept on a couch pleaded guilty Tuesday to second degree murder.

Kolby Clark was just 17-years old last March when prosecutors say he {A href=""}murdered 17-year-old Jasmyn Tully inside a Tukwila apartment.

After the March 17 killing, police say they found Clark wandering the nearby streets with a gash on his arm. He originally told police he and Tully had been attacked by another man. But investigators say Clark later admitted he "felt an urge to hurt someone," then stabbed Tully, whom he had known for a few years.

In the days after the murder, Clark's family members said he told them from his jail cell that he was high at the time of the attack, but prosecutors said there is no evidence to suggest that Clark was under the influence of drugs at the time of the murder.

Now 18-years old, Clark was charged as an adult in the case. The sentence range, which includes a deadly weapon enhancement, is 12 to 20 years in prison. Prosecutors will recommend 16 years in prison when Clark is sentenced on April 12.