A discarded cigarette butt just helped close a 52-year-old murder case

Officials say a discarded cigarette found near the body of a 24-year-old Vermont school teacher nearly 52 years ago helped lead investigators to an upstairs neighbor who they say strangled her in her apartment.

source https://www.cbsnews.com/news/murder-rita-curran-william-deroos-solved-after-52-years-dna-cigarette-butt/