Sarah Carbaugh testified that she decided to drive on County Road 300 North, by the Monon High Bridge trail entrance, on the afternoon of Feb. 13, 2017. It was a beautiful day and she was off work, she said, so she decided to scope out how many people were using 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.

A runner testified that she saw a man and two girls on the trail on the day the girls when missing. Day 5 of the trial continues Wednesday.