This is my current thinking. Yea, it changes a lot, LOL!
1) We know LE has kept pretty much all info to themselves. I think one thing they kept super secret and felt very important was that more than one person right after the murders told them about a car parked at the old CPS building that afternoon. One of those people also helped them with the new sketch. The witness. They filed these away in the game changer super secret drawer.
2) So while LE was asking about cars parked at the trailhead etc and people walking around they never mentioned the CPS car.
3) Everybody seen on the trail that day contacted police...except BG. I’m guessing every car parked at the trailhead, etc contacted police...except CPS car, making it more suspicious to LE.
4) Recently, LE got an anonymous tip that named the killer, and said the killer had driven a borrowed car to the trails and parked at the old CPS building. This is what shot the investigation into a new direction.
5) At the press conference LE said they needed the driver of the car...an appeal to the owner to come forward and confirm the named guy was in fact in the car that afternoon.
6) I now think LE was not talking to the killer at the press conference but that everything they said, the new video and audio, mention of the CPS car, the new sketch was meant to communicate to the anonymous tipster that we got your tip, we believe you, we have evidence to corroborate your info, we would really like to talk with you.
It’s possible they don’t yet know his name yet, and it’s possible the killer might be in jail right now for some other crime, but LE is right there. They need some tidying up information and now have someone to get it from. I might just be dreaming here but, gosh, I think it’s real close.