Thank you for the better insight into the arrest/prosecution/etc process than I could've given
Just to be clear though (despite fear of going OT, although I think this post is probably going to be more on topic than my last post was! Whoops..) I wasn't actually saying that I think LE know who BG is and aren't arresting him because they are "building a case." I was just sort of speaking in general terms because I had interpreted MJPeony's post as them saying they were generally confused about why it could be that
if LE knew who BG was, why there might not have been an arrest already, and I chimed in with my basic understanding of why arrests might take longer in murder cases. I see I was maybe stating the bleeding obvious and my comment was unnecessary, having read back over everything
MJPeony seems to me now to be speaking much more specifically to there being enough evidence to meet the requirements for probable cause to make an arrest in this case, if the situation suggested by the poster they were replying to was in fact actually what is happening in this case, including referencing the exact bits of evidence they thought would be enough to make an arrest - I completely misread that earlier. Apologies, I seem to have wasted everyone's time and should've read more carefully/thoroughly - not least of all because this is a specific case discussion forum, and not a 'generally what happens in murder cases' forum
musta had not-enough-coffee brain this morning.
MOO was/is actually that LE do not know who BG is. Or, more specifically, that they at the very least did not know before the last PC, and if they do know who he is now, they only just starting zeroing in on him after finding the right tip or tips among the new tips that have come in since the PC. It is, of course, also possible they had a POI in mind before the PC and needed more information from the public, rather than needing the lead that puts BG on their radar
as possibly being BG. They have been very successful in keeping the general public from figuring out things like COD, whether they have DNA, POIs they have looked at, which obviously leaves a lot of these questions very open. It seems almost like it is just a 50/50 chance on lots of these things - they either have DNA or they don't
. But for the reasons you have touched on, as well as other things that are just my own speculative opinion/feeling like my own impression of the last PC, I personally feel it is more likely that LE did not know who BG was before the PC and that once they have identified him from a tip things will move very quickly because his identity will actually be one of the last pieces of the puzzle to put in place, most of the rest of the 'puzzle' being completed around the blank space that is BG's identity already. Hope so, anyway!!