I think it's safe to conclude at this point that the police is going to co tinue to take the mushroom approach (feed us crap and keep us in the dark) with the press and the public. What isn't clear is if they doing this to protect the integrity of their case or if it's being done to avoid having their competency scrutinized.
I really hope it's the former and the killer does not escape justice not because it's actually the latter leaving us in danger of a killer at large.
How long is it ok for the police to keep saying we have nothing to report but we are working it? A week, a month, a year, longer? It's so difficult because for all we know, the police know exactly who did this but are keeping their powder dry waiting for the killer to slip up and give them the evidence they need to make an arrest. It would be tragic if public impatience forced the police to tip their hand and a killer got away because of it.
I wish I knew the right thing to do but I really don't.