“I had to tell him, in all candor, if this investigation had moved forward years ago, the technology did not exist, the techniques did not exist that were employed in this case to unwind it the way that we were able to do it now,” Pierson said. “I wish it had occurred sooner, that we could have gotten him out of custody sooner. The practical reality is it’s only been the past year and a half, two years that genetic genealogy to identify someone in these circumstances has been in existence.”