You're exactly right. DC has been repeating the same things since early on. He also refuses to call it a cold case, even after three years. I understand not wanting to give up hope. Unfortunately, I think DC, by his gung-ho attitude, is leading people to believe the case is so-so close to being solved. He means well, I'm sure, but he's also setting people up for major disappointment.
Reading what has been posted on the Internet about certain POIs (four people come to mind), I wonder if that April PC had played a negative role, and sorry, it is the fault of LE but even more so, anyone who gave the idea to the LE.
If DC says that the man on the bridge is responsible for the killings, for me, that statement exonerates at least three of the four young people mentioned (or discussed) online (I don’t know the height of the third one).
But what happened, when everyone started comparing a very bad sketch with their neighbors and acquaintances, or just faces from the yearbook, is the result of the PC. And essentially, we have a tricky situation here.
Another side to it - people are afraid now to even post (possibly, valid) suspicions, as they don’t want to be the part of that smear campaign.
So what the LE is saying now, don’t sleuth, is true...only it was triggered by that conference, and the goal yet has not been reached.
My feeling - I don’t know if LE has messed up the case. Possibly, not. Maybe it is too difficult. But whoever scripted that conference made a mistake.
LE owes the public another PC. Targeted not directly at the killer. (Maybe they are wrong with their POI, either). LE needs to address the public. (And maybe they do need to release more audio, but I am not a specialist). But they definitely need to consult someone with experience as to how to proceed from now.
ETA: someone who is not from the area and has not broken the investigator’s neutrality. Someone who has the optics. Someone who can communicate with the public in a logical, not paternalistic/family way. I think one of the problems is, local LE is very local.
(You know who I thought was excellent as the example of a LE? Michael Rourke from the Watts case. He is a DA, I know. But he could somehow combine logic with emotions with neutrality and still do the job. Is there someone like him to consult? The locals seem too close, sorry, then there is already agglomeration, showing with the families on TV...not good for the case. People like Paul Hole are celebrities, I don’t think it will work. The case needs someone logical).