A detective from Everett, Washington, linked two cold case killings to a known predator. Needing fresh DNA to charge him, she helped devise a clever undercover sting using chewing gum to crack the case.

Original source: https://www.cbsnews.com/news/judy-weaver-susan-vesey-washington-cold-case-murders-mitchell-gaff-chewing-gum-dna-48-hours/