I'm just going to say that if Canada never charges anyone in the deaths of Lucas and Chynna, that will be an international disgrace. Horrifying for the families. Unbelievable. If they think there's not enough evidence to charge K-B, that needs to be said at some point. If someone else could have done it, then they need to look some more.
But not charging anyone in the deaths of international travelers, that's tone-deaf and really a bad look. If there's not enough evidence to convict K-B then that's different. But we all need to see that the Canadian justice system works. If they can't be convicted in the two other homicides, so be it. But there must be a trial.
To simply wave hands and say "oh those guys did it" and not go after those guys...bad news. If the guys are never found, not the best case scenario, but understandable. Will be sobering. The fact that RCMP has pretty much said they did it (and launched an all out manhunt) means that they have to dispose of this case somehow (in world opinion).
Of course, Canada can just take its own stance. And people will still drive the Alaskan Highway, but...there not with the idea that it's a happy place.