This seems like an unusual case where a guy murdered once and lived in the same area for decades afterwards without repeating a crime of violence with any similar characteristics. The fact that, at the time, he lived within 4 miles of the victim probably doesn't play into things much if they probably met at a club.<p>It's tragic of course but it's not clear that there's much to be learned for law enforcement from this other than that some people can go very far off the deep end once in their lives and not repeat it.
This is exactly the wrong way to do DNA testing. These tests have a finite accuracy (say 99.99%), so when you shotgun it across a database of tens of millions of people, you get a long list of almost all innocent people, at least one of whom may be placeable at the scene, especially 20 years later. Most defense attorneys can’t teach statistics well enough to most juries for them to understand this math.<p>Lot of innocent people in the next few years are going to go to jail or death row. I can only pray I’m not one of them.