>> the mystery kept its grip on jean miller as well, inspired him to start a cold case unit. >> dings dramatically on in howell cases are investigated. there is more that can be done. >> eventually in 2013 she joined him eager to dig into the case of michelle and jenny. binders and binders of leaves and interviews, 27 years of dead ends. >> so her bicycle was back here in this area. it was laying on its side. the suspect had taken some of these ferns and ripped them out and laid them on top of the bicycle to camouflage it. >> further down the path deeper into the woods but they found jenny, they discovered her body in a shelter of sorts. >> one of the original detectives described it as something like a igloo or a cave made out of the vegetation. >> what you get out of being at place where she was found? >> for me as a investigator it was important for me to come and see it to understand better what happened and get myself into the mindset of the killer. there are days i would get frustrated sitting in the office working on the case and i would drive down here hoping something would c