Liz, how were they able to get these new details about the suspect. >> Yeah, Tom. Well, the most critical thing they did was analyze that surveillance footage that was taken here at the house.That's how they were able to get those details like his height and his build. The FBI is hoping that this is now going to help narrow down the thousands of tips that are pouring in. Tonight, investigators back outside Nancy Guthri's home, erecting this white pop-up tent on the front porch, the very place where NY's nes ...