Nation A 24-year-old teacher was murdered in 1971. DNA on a cigarette butt just solved the case. February 22, 2023February 22, 2023Lilly St. Angelo, Burlington Free PressComments Off on A 24-year-old teacher was murdered in 1971. DNA on a cigarette butt just solved the case. Rita Curran was violently killed in 1971. After 52 years, the case has finally been solved – with the help of DNA evidence found on a cigarette butt.