A detective devised an unusual plan to catch a killer: using chewing gum to secretly collect his DNA. Peter Van Sant reports on the undercover operation that helped solve the cold case murder on the season premiere of "48 Hours."
A detective devised an unusual plan to catch a killer: using chewing gum to secretly collect his DNA. Peter Van Sant reports on the undercover operation that helped solve the cold case murder on the season premiere of "48 Hours."
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