Identifying the killer through a relatives DNA via a website...and then stealing the suspects DNA from an item, through trickery or whatever...is one thing. Whether or not that evidence will be admissible in court is another. Having done the AncestryDNA thing myself, I was careful to read the fine print. The police cannot just waltz in and access a persons DNA...regardless of their "noble cause" of trying to catch a killer. This isn't about the Golden State Killer...the issue of concern is "the rest of us". It specifically states on AncestryDNA's website that your data could be made public and also available to police IF THEIR DATABASE IS HACKED. My first thought at the time was "yeah, that'll be interesting when the prosecution presents stolen evidence against a defendant." The most solid evidence in the world is worthless if it wasn't properly obtained. And I suspect that when this Golden State Killer's attorney's have their day in court, their first challenge will be to have the evidence declared inadmissible. Such tactics of using "backdoor" approached in gathering evidence need to be squashed right now, or else they will spiral out of control.