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.

The trial of Richard Allen, 52, entered its fourth day of testimony on Tuesday and included the previously unseen video. It came a day after the jury was shown gruesome crime scene photos of the victim’s dead bodies.