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Murder Mystery: Detectives say they know who killed Tammy Mattson, but need help proving it
ISLAND COUNTY, Wa -- Most murder mysteries are about finding an unknown killer, but in the 16-year-old homicide case of a mother in Camano Island, the Island County Sheriff’s Office says it knows who and where the killer is -- they just need your help building a case against him. On December 9, 2003, 39-year-old Tammy Mattson was found murdered at Camano Island State Park.