Excellent synthesis!
On Point 12 -- he said he thought about it a lot... I can't help but wonder if he meant he thought about why he called the tipline. Without it, would he ever have been arrested?
He says KA told him to.
I'm going to read been his lines. Were these his choices? Either call in as a way to convince KA 'there's nothing to see here, would I call if I had anything to hide?' OR not call and have her question what I might be hiding?
She must have been standing right next to him. Standing right over him. Because why wouldn't he just say he would call or he did call. I can almost picture her dialing the number for him...
It's really Libby's phone that convicts Jim.
Without her phone, there's no confirmation for where the abduction started, for who was following them, for what was used to control them (a gun), for the elevation change and creek crossing, or the 2:32 which memorialized Abby last movement. (One thing to consider is that, whatever was happening to her, how ever it was happening, she was frozen -- surely in fear -- but also quiet possibly to give the phone hidden.) We really don't know what time they were attacked and then succumbed to their injuries, but it was well within his self-reported 1 to 3, corrected to 1:30 to 3:30, and fits with his final sighting at 3:57.
I wonder if LE was able to review CCTV into the evening. Because I wonder if RA walked home (because he was muddy and bloody) and retrieved his car after dark. At that point CCTV might only show headlights, no detail. Still, walking home would account for a clean car and no CCTV of his car around 4 pm.
I don't think Richard Allen had issue with describing what he was wearing (or identifying himself initially as the man in the photo) because he knew he'd been seen but he would have been 100% that only Abby and Libby knew he was the murderer and he made sure they were dead. Never could he have imagined, at the time he called in the tip, the photo came from Libby and was a frame from a video. He thought he was safe, as just a visitor to the trails, dressed as he was. Some mystery killer came along after he left. (Which is of course an angle the Defense tried to draw but failed at because of Libby's phone, which remained on but showed no steps, no movement, and was found under a victim. There's just no way to build out a story to account elsewise for the raw data.)
I bet he kicked himself a lot for calling himself in. And wouldn't have if he'd known where that photo came from. He didn't know his victims (with the evidence on the phone) called in their own tip.
JMO
Any idea why he didn't change his clothing description in 2022?
As you said. He knew by then that the man in the blue jacket and jeans was the main suspect. To my knowledge he never told Dulin what he was wearing in the 2017 grocery store car park interview.
He changed his timeline after they found the lost tip. Why not his clothes?