>> i said "in case that this guy had been arrested now, and you got new d.n.a. on that databank, would you run this?" "no, we can't take it." >> reporter: then the attorneys tried. they asked the prosecutor. >> we start saying, "please run the dna through the data bank." "please do it," and he refuses. >> reporter: the state finally ran the dna three months after sam lockhart first started asking about it. >> and low and behold, we find charles boney. >> charles boney. does this name mean anything to you? >> didn't mean a thing. i'd never heard the name before. uh, it was a complete shock to me. >> reporter: charles boney. a name that would change everything in the case against david camm. boney. his prison nickname was "backbone": the same name inked in on the sweatshirt's collar. >> who does this guy "boney" turn out to be? >> as brainy as ted bundy and as brawny as mike tyson. he's a sociopath. >> reporter: charles boney -- a criminal with a history of violent crimes against women. it began in the 1980's, when he was a student at indiana university.