So my take on things is, as B's father suggested, he is on a "suicide mission". I believe this will be (if it hasn't already) the end result for the 2 of them. They are millenials, hailing from a pulp mill town (where limited jobs like clerks at Walmart don't appeal to them). They for-see no real future for themselves and B, in particular, has expressed violent scenarios to acquaintances. Not sure if they really intended to go to Whitehorse (some references mention Alberta) to look for work. I rather think they wanted to travel somewhere less inhabited to carry out killings (for the fantasy, thrill, experience) of it and stall LE in the wake. All for the notoriety of it, knowing it would captivate an entire country (and others). They will not let themselves be captured. There is no way they would let themselves go to prison. This entire thing is just another "game", to leave everyone guessing. They want it that way so the puzzle will never be solved and people will speculate for quite some time. They got way more than 15 minutes of fame already!