I so admire your optimism, and like any other theory, it's possible.
Many of us have had that same sort of hope on previous cases that are still waiting to be resolved....Kyron Horman, Holly Bobo, Lauren Spierer are ones that come to mind. With little info coming from LE to the public on these missing folks, we WANTED to believe LE had the suspect in their sights but were just gathering probable cause. In Kyron's case, LE told us it would be wrapped up in a week. That was 2 years ago.
I do not want to dash hopes here, and I have MUCH admiration and appreciation for LE. I just haven't recently followed a case where it happened that LE knew who they were after and then several weeks later nabbed him when all their ducks were in a row. Maybe some other members have different experiences and could discount my opinion, and frankly, I'd be thrilled and delighted to hear that. I have not enjoyed developing this pessimistic attitude in my old age.