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.

52-year-old Richard Allen is charged with the murders of 13-year-old Abby Williams and 14-year-old Libby German. Abby and Libby disappeared during a hike on Feb. 13, 2017, near the Monon High Bridge Trail in Delphi. Their bodies were discovered in the woods near that trail a day later.