If you had to kill someone specific as professionally as possible (or not), how would you do it? Provide some context to your answer and everyone can unconsciously judge you on what country you're ip says you're from.

I live in Vancouver, BC, so I would probably use fentanil to kill them. Such small amounts are needed, I could probably dust their mail with it and have them die from the inhaled particles and skin exposure. Since fentanil is mixed into a lot of drugs here, people will just assume that the victim had ODed on a laced molly or xanax or whatever.