From a Walnut Creek Police Department press release:
On Tuesday September 11, 2012 at approx, 4 PM detectives from Walnut Creek PD reacting to a tip provided to Concord PD located missing juvenile Larissa Huntsman at a residence in Concord.
Walnut Creek PD detectives have been searching for Huntsman since she was last seen on 8/24/12 leaving Las Lomas High School.
The investigation determined that Huntsman was voluntarily missing, with the knowledge and assistance of her biological, non-custodial mother, Laura Huntsman. Larissa was in hiding at the Concord residence.
This case will be referred to the Contra Costa County District Attorney’s Office for the possibility of criminal charges being filed against Laura Huntsman.