IIRC, you've been expressing for quite awhile that KAK is not the culprit and that LE is not very professional. An opinion to which you are entitled.
IMO the fact that not only an arrest has been made, but that Kelsi German said that "today is the day," leads me to believe that RA is, in fact, the one. Whether or not he is tied in any way to KAK is something we will likely hear on Monday or perhaps not until trial.
It seems to me, though, that LE has been methodical and diligent. Clearly they have developed evidence now that they either didn't know earlier, or they needed to make sure they had enough to make the case stick in court.
I'm not quite sure what you mean by your second question. LE cannot haphazardly arrest every man who is in plain sight, without evidence. We've never known everything LE knows, and after five plus years, I'm content to wait one more weekend to hear from them.
Separately, I'm also very curious about the burn pit.
If he burnt something that is essential to the case, if he did that five years ago, what would remain by now? OR did LE start to close in now, maybe due to new information, perhaps from KAK, and RA rushed now to try to destroy evidence?
Monday, Monday.
IMO