The Brief Police are searching for a missing woman in Seattle's Ballard neighborhood. Authorities say 23-year-old Clarissa has autism and is considered endangered. Police are asking for the public’s help in locating a missing woman with autism in Seattle. Missing: 23-year-old Clarissa. What they're saying:Police say 23-year-old Clarissa was last seen in the Ballard neighborhood, near the intersection of Northwest 60th Street and 22nd Avenue Northwest.