>> probably because he felt safe out here. >> reporter: for detectives like todd babcock it all seemedpt for one thing. the crime lab had determined that one of the unidentified sets of remains, jane doe number 7, was a young black female. >> when they told us that they had a young black girl, i thought, i didn't have a young black girl on my list. >> reporter: for medical investigator wendy honeyfield the bones of jane doe number 7 and her pink-tipped acrylic nails were a beguiling puzzle. >> she's like a lot of other cases that we had skeletal remains that come in. and there's so much work that's always done behind the scenes to get them identified. that nobody really ever sees. >> reporter: for the detectives who were trying to catch a serial killer those remains represented a wild card with staggering implications. what if the west mesa grave digger was a prolific transient? what if jane doe number 7 was just the first of many victims the grave digger brought to the west mesa from somewhere else? >> who was she? where did she come from? how did she get to albuquerque? not all those