It's sad that some names achieve such a notoriety that it's hard to disassociate their legacy when they're seen out of context, but it's just a combination of a common forename and a common surname. The subsequent appearance of the second name is unfortunate and will have given a confirmation bias to the earlier encounter, but I doubt there's anything sinister afoot. Whether it was added manually or generated through string manipulation we'll likely never know its provenance. While there's a small possibility it was put there as a deliberate reference to the convicted killer, the odds are much higher that it wasn't. Even if FD were minded to filter out names that matched notorious real-life individuals, the technical challenge would be enormous and require constant update and maintenance.
On a technical note, having played the game since before the backer NPC names went live, I have a strong suspicion that as well as the full versions of registered names some "firtname/lastname" mixing-and-matching may also have been used. This is a possibility that was talked about in the early design, but as far as I know was never officially adopted or rejected. One of my NPC names is my wife's, and while her first name isn't astonishingly rare it's unusual enough that I notice it when it pops up in the game. In five years I've only seen the full name three times, but I've lost count of the number of times I've seen her first name in conjunction with other surnames. And our own surname, while not nearly as uncommon, seems to pop up all over the place including a fair number of stations that I definitely didn't pay to name. I suspect FD may have seeded the RNG name algorithm with some separated backer names as well as the more obvious dedications to authors, movie directors, astronauts and scientists etc.
But of course all that could just be confirmation bias too.
Personally I miss the
pop culture alpha NPC names. Whatever happened to Bat-Crazy Roy, Daisy Hal, Cat Jones and the others?