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.

The man dubbed "Bridge Guy" has long been considered the suspect in the murders of the two teens. Prosecutors have claimed that Richard Allen, charged with murder, was the man seen on the trail.

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.

DELPHI, Ind. — So far in the Delphi murders case, jurors reviewed graphic crime scene pictures, testimony from eyewitnesses, and a video that murdered teenager 14-year-old Liberty German captured of her own abduction.

Richard Allen, 52, is facing two counts of murder in connection with the killings of Abby Williams and Libby German.

Tuesday was the first time prosecutors revealed a portion of the video that shows a man who they allege is Richard Allen.

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.