With the help of a genealogist and other investigators, including from the National Center for Missing and Exploited Children, Mr. Headley identified Lisa as Dawn Beaudin, who was last seen in Manchester, N.H., in the early 1980s. Her mother, Denise, had gone missing and is believed to have been murdered by the same man who had abandoned Lisa at the trailer park, and went to prison for murder in California.
[...]
Using similar techniques with a DNA sample from the man known as Larry Vanner who died in prison in 2010, investigators discovered the identity of the New Hampshire killer. Last year, New Hampshire authorities
identified him as Terry Peder Rasmussen, who was originally from Colorado, and is now believed to have carried out killings across the country.