located her and spoke to her. >> what'd she have to say? >> she floored me. >> reporter: why? that visitor was not blocked by the fence like her relatives were. she'd been sitting in full view not more than 15 yards from tara's front door, and she saw a lot. >> she did see a vehicle pull in a couple different times. and then the second time she saw the vehicle there, it was backed up to the front door. and the two guys got out, opened the tailgate, and we were walking back and forth inside the front door. >> wow. >> yeah. >> and that was, kind of -- how important was that in the -- >> extremely important. she -- she identified david mcmannis as being at the house with barr. she identified him there at a time when the pickup truck was backed up to the front door. what other reason was that pickup truck backed up the front door other than to take tara out of that house? >> reporter: we went out to the house to get a better idea of where this woman was sitting and what she could have seen. >> so, she's sitting right here.