Vegas police: New DNA testing led to suspect in 1989 killing July 21, 2021 FacebookTwitterEmail LAS VEGAS (AP) — Tiny bits of DNA evidence and money from a donor helped investigators identify a suspect in the 1989 rape and killing of a 14-year-old Las Vegas girl, police said Wednesday. Darren Roy Marchand, the Las Vegas man now accused of attacking and strangling Stephanie Issacson more than 32 years ago, had been a suspect in another slaying and killed himself in 1995, police Lt. Ray Spencer told reporters. Marchand, then 20, had been arrested in 1986 following the strangulation of 24-year-old Nanette Vanderberg of Las Vegas. He was released when the case was dismissed over a lack of evidence, Spencer said.