After his sister cracked into his social media, Blaze Bernstein’s family was able to make a phone call to an unknown contact Blaze messaged the night he disappeared. Speaking exclusively to 20/20, Beau Bernstein discusses how she was able to help lead police to her brother’s killer. Watch tonight (Jan. 3rd) at 9/8c on #ABC2020 “The Last Text" full episode. Stream later on Hulu. #BlazeBernstein #Missing #TrueCrime #Investigation