NEW 20/20 SEASON PREMIERE: The 20-year-old college student was last seen when her friend dropped her off after a night out in downtown Salem. Now, Claire Gravel's brother speaks with Co-Anchor Deborah Roberts about learning she vanished. 20/20 'The Salem Strangler' premieres Friday, Sept. 25th at 9/8c on ABC. Stream on Disney+ and Hulu. #Investigation #TrueCrime #ClaireGravel #ABC2020