'They are really good at what they do': Investigators take part in forensic training exercise

Crime scene investigators took part in a technique called line searching, where they work on a small area and check for vegetation changes in the ground. "Any kind of depression in the ground, any kind of trees that may be trampled over or branches that may be out of place, things like that," said Council Bluffs Crime Scene Investigator Cassie Salter. She said investigators used line searching for an investigation into human remains found near Lake Manawa last year.