LANCASTER - A Lancaster teen accused of stabbing to death a classmate and the other boy's parents will plead guilty in the case June 17, a prosecutor said Friday.

Lancaster County District Attorney Craig Stedman declined to name the offenses that Alec D. Kreider, 17, is expected to admit. As a juvenile, Kreider does not face the death penalty.

He is accused of killing 16-year-old Kevin T. Haines and Haines' parents, Thomas and Lisa, in their suburban Lancaster home in May 2007.

The couple's daughter, Margaret, a Bucknell University student, was awakened by the commotion around 2 a.m. and ran to a neighboring home to summon police.

- AP