Or they never made it as far as Whitehorse, nor was looking for work ever their prime intention even if their families believed they’d head straight there?
The RCMP stated they were building a timeline and they do have the means to do so through CCTV, Highway cams, cellphone towers, purchase card usage, possibly even space satellite imagery, etc. Once they release the conclusion of their investigation, the actual route will be interesting to learn.
But even if murdering wasn’t preplanned (which I don’t think was), it’s not a real stretch to imagine an 18 and 19 who first experience a taste of freedom - nobody watching over them, no curfews, no watching a clock (time to go to school or work), nobody nagging at them to clean their room or help with yard or housework - nobody to answer to - often they go a little stir crazy. Toss in alcohol or pot (legal in Canada) or other illegal drugs, poor judgement, lack of self control, hot tempers, a thrill in crossing moral boundaries including a rise out of theft, “winning” (as emphasized by intensive video game play), no police for hours around and no cellphone/911 coverage.
A minor comparison, drop a wallet full of cash and ID on the street. Some people would take the money and toss the wallet in the garbage, others would turn it over to the police, money intact, so it can be returned to a grateful owner. K&B would fall into the first group. They murdered even if robbery was the initial motive because they thought they’d get away with it and then fled thinking nobody would ever find them. Cowardly, their suicide was an admission of their defeat.
JMO