The mother of slain Escondido teenager Amber Dubois has joined the search for a missing Northern California teenager.
McGonigle has become involved in the searches for other missing people since her daughter Amber was abducted and killed by John Gardner in 2009. Her body was found years later in a remote area of Pala in northern San Diego County.
McGonigle formed "Team Amber Rescue," after her daughter’s death in order to help other families search for their loved ones.
The group is officially trained in search and rescue and has helped in many searches both in California and out of state.
Just eight months ago, McGonigle and a search dog named Amber found the body of Michelle Le, a missing Bay area woman.
Sierra LaMar was last seen getting ready for school on March 16. Investigators have said they are treating her disappearance as an abduction.
A reward for information in the case is currently set at $25,000.
The Santa Clara County Sheriff's Office has conducted extensive searches in the area surrounding Sierra's home since her disappearance, including searches of reservoirs and other bodies of water.
Anyone with information about Sierra or her whereabouts is asked to call the sheriff's office at (408) 808-4500 or the anonymous tip line at (408) 808-4431. Tips can also be emailed to email@example.com.