I am wondering why a lot of posters shocked it was his first serious crime. He was only 21.
It's a crime that's fraught with a lot of potential misses and it's aggressive, highly aggressive.
It would be like making a wedding cake if you've never baked or even cooked before. It's doable, but highly unlikely.
To go from a quiet, never in trouble kid to this is a jump. No aggression reported from his school, in other words he wasn't used to "taking on" another person. It's reported he did some wrestling early on, and that would give him some confidence in being physically aggressive with another person, but it wasn't an activity he did for years. He broke into someone's private home, while they were home. Two adults. Not an elderly couple, but two adults who were both ambulatory. Guns in the homes in most places in that area. He'd stand more of chance of getting shot than being successful, he didn't hesitate, he was quick and methodical, he didn't have an issue with being in an unfamiliar home with two adults who were armed. Yet he was a quiet kid in school who never got into trouble.
Let that sink in, he never got into trouble. No trouble. He didn't invade people's personal space, he didn't sit at the back of the room carving his initials in the desk, he didn't peep into windows, he didn't steal things off his teacher's desk, no pushing or shoving, no aggressive behavior or boundary issues.
Each thing he did was crossing a boundary, breaking into a home, shooting the residents, grabbing their child, evading the police, holding her hostage for months. Each of those actions were crossing a boundary, a huge boundary, and yet he did it having never crossed any boundaries before other than siphoning gas once? I'm not buying it, IMO.