Here’s how modern forensics helped revive an Arizona cold case. John Quiñones reports on the investigation breakthrough that finally solved the young woman's murder. Tap the link in ABC2020 bio to read now and watch 20/20 'Home Alone' premiere tonight (Oct. 2nd) at 9/8c on ABC. Stream on Disney+ and Hulu. #ABC2020 #AllisonFeldman #DNA