Gum-tasting sting ties suspect to two Washington cold-case murders

Undercover detectives used a gum-tasting ruse to collect a DNA sample from Mitchell Gaff, which matched DNA found on victim Judy Weaver and connected him to her 1984 murder and Susan Vesey’s 1980 killing. Advances in DNA technology, including STRmix and CODIS, allowed investigators to link the cases four decades later; Gaff pleaded guilty and faces life in prison, bringing closure to families after years of uncertainty.