A 68-year-old man has been sentenced to a minimum of 50 years in prison for the murders of two women, thanks to a novel approach by investigators that linked him to the crimes through DNA obtained from discarded chewing gum. Mitchell Gaff’s case, which lay dormant for decades, highlights both the challenges of cold case investigations and the innovative methods that law enforcement can employ to solve them.
The Unraveling of a Cold Case
Mitchell Gaff was apprehended after three undercover officers from the Everett Police Department posed as representatives of a gum company, gaining entry to his home in Washington. By offering Gaff a place to dispose of his used chewing gum, they were able to collect saliva samples that ultimately matched DNA evidence from the crime scenes. This unconventional tactic, referred to as the “gum ruse,” led to his arrest in May 2024 for the murder of Judith Weaver, whose body was discovered on June 2, 1984, following a fire intentionally set by Gaff.
Gaff was later charged in March 2026 with the murder of Susan Vesey, who was found dead in her home on July 12, 1980. The investigations into both cases had remained cold for decades, until advancements in DNA technology allowed authorities to revisit unsolved cases.
A Pattern of Violence
Court documents reveal that Gaff had previously been convicted for the rape of two teenage sisters in 1984, which resulted in his DNA being entered into the national Combined DNA Index System. This crucial link eventually connected him to the murders of Weaver and Vesey. In April 2026, Gaff pleaded guilty to both counts of first-degree murder, providing chilling details of his heinous acts in open court.
According to Gaff’s statements, he had no prior acquaintance with either victim. He described how he randomly checked doors, finding Vesey’s home unlocked before entering to commit his violent crime. Four years later, he attacked Weaver in her bedroom, subsequently setting her home ablaze in a misguided attempt to destroy evidence of his actions.
Innovative Investigative Techniques
The use of DNA evidence in cold cases has become increasingly sophisticated, allowing law enforcement to revisit long-buried files and bring closure to victims’ families. The Everett Police Department’s creative approach in Gaff’s case exemplifies how traditional methods are evolving to incorporate modern science, reflecting a growing trend in law enforcement across the globe.
Detective Susan Logothetti, who played a key role in the investigation, expressed her exhilaration upon successfully obtaining the DNA samples. “Watching him spit the first piece of gum into the ramekin and seeing the saliva was a moment of contained excitement,” she recalled, underscoring the delicate balance between investigative ingenuity and ethical considerations in law enforcement.
Why it Matters
The resolution of Gaff’s case underscores the importance of persistence in cold case investigations and the role of technology in modern policing. It serves as a poignant reminder that justice can prevail, even decades after a crime is committed. As law enforcement agencies around the world continue to harness the power of DNA analysis and creative investigative techniques, the message is clear: no crime is too old to solve, and every victim deserves justice.
