If LE has evidence as to the very jacket it could clear him also.I go back to when TL (in the Carroll County Comet) said that people had turned in blue jackets, but not THE blue jacket. IMO, that is one of the more significant statements made in the entire six years. That suggests to me that they have some kind of evidence that will be able to identify the very jacket worn by the killer that day. If RA truly does have the same blue jacket he wore on the trail, like his wife says he does, then if he is the killer, his jacket will become a snitch. Not only that, but RA placed himself on the bridge, in that jacket, on that afternoon. And L's video showcases it front and center at 2:13 as he approaches them.
I know some people think he replaced that jacket with a lookalike, which is always possible. But I'm hopeful. It's a reminder to me that no matter how much we might question the timing issues in the PCA, it was enough for an arrest, and there's likely so much more evidence that will be key in court. JMO.
ETA: or at least cast doubt on his involvement.