Warren Pennick of Lansdale pleads guilty, but insane

He stabbed his mother to death on Halloween

Published: 5:30 PM EST Jan 14, 2014   Updated: 8:04 AM EST Jan 15, 2014
Warren Pennick pleads guilty to killing mother

Warren Pennick of Lansdale pleaded guilty but mentally ill to third degree murder in Montgomery County Court Tuesday.

Assistant District Attorney Jordan Friter reported 55-year-old Pennick was sentenced to 20-40 years in prison for the Halloween 2012 slaying of his mother.

Investigators said Pennick repeatedly stabbed his 79-year-old mother, Lorraine Pennick, and slashed her throat in their Lansdale home before leaving the 7-inch knife on her chest, changing clothes and walking to the police station to confess.

Pennick's attorney said his client has suffered since childhood from paranoid schizophrenia and delusions.