Belmont Police, FBI and the San Mateo County Sheriff s office all searched a home and a park on Farm Hill Boulevard Wednesday in Redwood City for evidence in a nearly 30yearold cold case. Police say the search is about Ylva Hagner, a 42yearold woman who went missing in October of 1996. , coldcase, redwoodcity, fbi, sanmateocounty, YlvaHagner, belmontpolice, sanmateocountysheriff, nasa, abc7news