(CBS/AP) MORGAN HILL, Calif. - Investigators in the disappearance of 15-year-old Sierra LaMar say they plan to expand their search of reservoirs and small bodies of water.
Authorities said Monday that tests on evidence collected so far in Sierra LaMar's disappearance have given them new leads, but they declined to say what those leads were.
LaMar is believed to have been kidnapped. The Morgan Hill teen was last seen by her family before she left for school on March 16.
At least two Santa Clara County reservoirs have already been checked with sonar for any signs of LaMar. Sheriff's spokesman Jose Cardoza tells the San Jose Mercury News the use of sonar will continue as part of the expanded water search.
Cardoza told The Los Angeles Times that despite receiving more than 1,400 tips and logging about 8,900 personnel hours in the case, authorities do not have a person of interest in the case.
Anyone with information about Sierra or her whereabouts is asked to contact Santa Clara County Communications at (408) 299-2311. During business hours, tipsters can call sheriff's investigators at (408) 808-4500 or the anonymous tip line at (408) 808-4431.