Statements are important, but they're also cheap. They're just words, so, for me, this is about actions.
Let's be clear about what we're talking about. The point here is that you cannot come and kill Canadian citizens, so there's a cost that's extracted as a consequence of that. Look, owing to diplomatic immunity, which I support—there are good reasons under international law for having that—we couldn't prosecute, but that does not mean there should not be a consequence. Think about trade remedies; think about sanctions, and think about working together to punish this behaviour. There needs to be an actual corporeal, tangible consequence.
Statements are great, and I think that's your entry point, but for me there has to be a significant cost associated with this.