Mostly I agree with you, yet our RCMP are in a bit of an awkward spot. The parents of two of the victims are not obliged, as are we under our privacy (secrecy) laws, to accept a conclusion that the two youths are guilty because 'we say so'.
In particular, Lucas' father is an Australian cop, I doubt he will accept anything but a full disclosure of the investigation. Then there's the US and Aussie press, neither of whom are bound by Canadian laws. Not least, we BC residents have a tax-payers right to know our roads are safer because the correct criminals are dead.
Lots of legs on this one yet. Its been two weeks since the autopsy, and you say the RCMP are still investigating. Difficulty trying to match the evidence well enough to prove guilt, perhaps?
It is a complicated weave of information, I'll credit them that much.