. >> yolanda mcclary was a crime scene investigator and at the time an nbc news consultant. >> a crimene helps to tell a story. something where you can prove or disprove witness statements and testimonies through your crime scene, through the evidence. >> how many times have we seen a crime or someone willing goes away with the person who ultimately kills them and there is no crime scene? >> correct. if you willingly go it's just the last place you were saying. >> if the car itself gave investigators little to go on its location 60 miles from gricar is home did -- gricar's home did. >> we immediately went out and started talking to people. we got confirmation from people in some of the businesses in that area who saw him there for several hours throughout the day. >> they began building a timeline of movement in lewisburg. it wasn't easy. there was another mini cooper owner in town that day. sean weaver was the chief of belfonte police department. he says he knows the investigation inside out. >> there were a lot of signings of another individual that we later found out he was in an re