66
" Scrolling through the rest of the 3,500 documents in Michelle’s hard drive, one comes upon a file titled “RecentDNAresults,” which features the EAR’s Y-STR markers (short tandem repeats on the Y chromosome that establish male-line ancestry), including the elusive rare PGM marker. Having the Golden State Killer’s DNA was always the one ace up this investigation’s sleeve. But a killer’s DNA is only as good as the databases we can compare it to. There was no match in CODIS. And there was no match in the California penal system’s Y-STR database. If the killer’s father, brothers, or uncles had been convicted of a felony in the past sixteen years, an alert would have gone to Paul Holes or Erika Hutchcraft (the current lead investigator in Orange County). They would have looked into the man’s family, zeroed in on a member who was in the area of the crimes, and launched an investigation. But they had nothing. There are public databases that the DNA profile could be used to match, filled not with convicted criminals but with genealogical buffs. You can enter the STR markers on the Y chromosome of the killer into these public databases and try to find a match, or at least a surname that could help you with the search. "
― Michelle McNamara , I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer
67
" In the last year, ancestral DNA had become popular with people curious about their genealogy and, though this was much less publicized, as a tool for finding unidentified criminals. Many in law enforcement were wary. There were quality-assurance issues. Privacy issues. Holes knew DNA. Knew it well. In his opinion, ancestral DNA was a tool, not a certainty. He had a Y-DNA profile generated from the EAR’s DNA, which means he isolated the EAR’s paternal lineage. The Y-DNA profile could be input into certain genealogical websites, the kind that people use to find first cousins and the like. You input a set of markers from your Y-DNA profile, anywhere from 12 to 111, and a list of matches is returned, surnames of families with whom you might share a common ancestor. Almost always the matches are at a genetic distance of 1 from you, which doesn’t mean much, relative-seeking-wise. You’re looking for the elusive 0—a close match. "
― Michelle McNamara , I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer
69
" Even if you come up with Y-matches that are distant, but they all have the same name, you can say that is probably Mr. X’s last name and he belongs to the same extended family as those matches (along the direct line), maybe going back many generations. But in this case, there are a variety of names, so you can’t pin one down. The ‘flavor’ of the names can sometimes give you some ethnicity for your Mr. X. Say, if his list is made of all Irish names, you can say he’s probably Irish. That is what I did on the canal murders. Not only did I come up with the name Miller for their Canal Murderer, I also told the Phoenix PD that he was a Miller of Irish extraction. A few weeks later, they arrested Bryan Patrick Miller. That’s where I got the idea that the EAR had a German name but was from the UK. In the tests I ran for Michelle, that’s the ‘flavor’ of names I was coming up with.” So we were looking for a guy with a German name whose family at some point lived in the UK. Of course, he could have been adopted; then all bets are off. "
― Michelle McNamara , I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer
72
" One day soon, you’ll hear a car pull up to your curb, an engine cut out. You’ll hear footsteps coming up your front walk. Like they did for Edward Wayne Edwards, twenty-nine years after he killed Timothy Hack and Kelly Drew in Sullivan, Wisconsin. Like they did for Kenneth Lee Hicks, thirty years after he killed Lori Billingsley in Aloha, Oregon. The doorbell rings. No side gates are left open. You’re long past leaping over a fence. Take one of your hyper, gulping breaths. Clench your teeth. Inch timidly toward the insistent bell. This is how it ends for you. “You’ll be silent forever, and I’ll be gone in the dark,” you threatened a victim once. Open the door. Show us your face. "
― Michelle McNamara , I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer