Police are searching for a 64-year-old woman who went missing from her Fountain home on Saturday evening. Maria Sostre Rosario, who left her residence in the 8400 block of Dassel Drive about 5 p.m., reportedly told her daughter she was going for a walk around the block but didn't return, according to a news release from Fountain police. Rosario suffers from dementia, is on medications and had a brain aneurysm in the past, police said.