Billboards added in effort to find missing child

ABC 20/20 on Instagram: "The 18-year-old disappeared from the small Kentucky town, never to be seen alive again. For tonight's all-new 20/20, Jessica Currin's family recalls the night she vanished and the impact of her case. Watch @JohnQuinones' report "Lost in the Night: Who Murdered Jessica Currin?" premiere tonight (Oct. 24th) at 9/8c on @ABC. Stream on @DisneyPlus and @Hulu. #TrueCrime #Investigation #JessicaCurrin"

Discovery on Instagram: "In 1987, Theresa Ann Bier vanished deep into Ghost Canyon. The only witness? A man claiming Bigfoot took her. Decades later, the case is reopened and the truth that emerges is more disturbing than anyone could have predicted. Binge the full limited series #BigfootTookHer starting Oct 29 at 8P on Discovery."

Discovery on Instagram: "Jessica Chobot returns 40 years after Theresa Ann Bier's disappearance to revisit the chilling case. With justice still missing and many questions left unanswered, she's determined to find out what really happened to Theresa. Tune in to limited series #BigfootTookHer Oct 29 starting at 8P on Discovery."