The teens, who were in eighth-grade at Delphi Community Middle School, were hiking on a day off from school on February 13, 2017, near the Monon High Bridge, an abandoned rail bridge along the 10-mile Delphi Historic Trail, Indiana State Police said.Hours later, they failed to meet Libby’s dad at a previously arranged time, police said.

Three witnesses who were on the Monon High Bridge trail the day Libby and Abby were killed, including one who said she was best friends with Libby's older sister, testified Tuesday that a man they saw on the trail is "Bridge Guy" — the primary suspect depicted in a grainy photo police later shared to aid their investigation.

Richard Allen, 52, is facing four counts of murder in connection with the murders of Abigail Williams, 13, and Liberty "Libby" German, 14, in 2017.

An Indiana jury was shown a longer version of the infamous video taken from the phone of one of the slain teenagers in the Delphi murders case. The trial of Richard Allen, 52, entered its fourth day of testimony on Tuesday and included the previously unseen video.

Community members who searched for Abby Williams and Libby German in 2017 described their experience in court Saturday.