CARLSBAD
A 17 year old boy pleaded not guilty Thursday to murder in the stabbing death of a 68-year-old grandmother as she hiked a Carlsbad trail last month.
The Carlsbad teen, whose name has not been released because of his age, remains in custody at Juvenile Hall in San Diego, where he has been since his arrest as a suspect in the slaying of Lisa Thorborg.
Thorborg’s body was found Nov. 23 midmorning on a Monday on Hosp Grove trail, not far southeast of Buena Vista Lagoon. Blood at the scene tipped police that her death was suspicious. An autopsy revealed she had been stabbed.