Have you read about the capture of John Freeman Colt? As someone who follows National Park news pretty closely, especially in Utah (where I go frequently), I was pretty alarmed to learn he was within a couple of miles of where I was when he was captured. Apparently, they knew he was traveling from National Park to National Park, or otherwise staying on nearby lands.
According to locals in Moab, he is a suspect in the death of Kylen and Crystal, although of course, LE isn't saying so.
https://www.fox13now.com/news/crime/how-a-wanted-fugitive-from-kansas-was-caught-in-southern-utah
But search his name - there's way more to the story and other locations where LE thought he had been. I was pretty surprised to learn that some good friends of mine must have been very near him, as they were at Capitol Reef at the same time.