one girl whose face, age and biography seemed to match what she saw in the sketch. her name was syllania edwards. according to the web site, she had been a 13 year old runaway from a group home in lawton, oklahoma, in 2003. >> it was her ear, her ear that was exposed in the photo, and it was her eyes. that was what kept me -- bringing me back to her. >> dental records from oklahoma confirmed that jane doe number 7 was, in fact, syllania edwards. one answer found. but that only generated more questions, like, when did the oklahoma teenager get to new mexico, and, who brought her? >> don't know that's what we're trying to figure out. >> possibly the killer? >> don't know. have no idea how she got here. >> so detectives started checking with police departments and jails throughout the southwest on the hunch that syllania, as young as she was, might have been entangled in a prostitution circuit that shuttles women from city to city. >> what we see very often is women involved in prostitution working what's called the circuit so they'll move from phoenix to albuquerque and los angeles to vegas and maybe not return on that circuit for years. >> it was in denver, another city on the circuit, that detective todd babcock hit pay dirt. >> at one point she was arrested in the denver area for prostitution, going by a different name at the time, had been booked. they were able to get me a booking photograph of what syllania looked like around the time she died we believe. >> edwards was released from