Bay Area killer’s DNA was hiding in a piece of gum stuck to his teenage victim for years

Source: New York Post

The murderer of a 15-year-old girl in a 1978 cold case has finally been sentenced to life in prison — thanks to a piece of gum stuck to the victim’s back for more than 22 years. Mark Stanley Personette, 80, of Colorado was convicted late last year for murdering Marissa Rolf Harvey, who disappeared on March 27, 1978 after going to San Francisco’s Golden Gate Park for an afternoon of horseback riding. “After almost 50 years, Mr.