In December 1979, 18-year-old Michelle Martinko was found brutally stabbed to death inside her car at a mall in Cedar Rapids, Iowa. The case went cold for decades, despite links to serial killer Stephen Morin. Then, in 2018, a revolutionary DNA genealogy search led police to Jerry Lynn Burns — a well-liked businessman with no criminal record. Nearly four decades after Michelle’s murder, science finally revealed the killer hiding in plain sight. #MichelleMartinko #JerryLynnBurns #TrueCrime #ColdC

The investigation into a murder at a local mall would span generations as a detective takes over a cold case that his father had investigated decades earlier. Who killed Michelle Martinko? https://cbsn.ws/38oiKUV | 48 Hours