Good God you are ridiculous. I bet you think Hillary has had people killed or Obama supported terrorist though.
I don't think either of those things.
That's good at least. What would you consider proof then that political opponents and journalist that write against Putin just happen to become poisoned?
Any actual evidence that Putin directed people to murder someone on his behalf. It's just as likely a scenario that his people just do this without any involvement or direction from him. It actually makes more sense that they would because if he doesn't know that they're doing so then he has plausible deniability.
He doesn't need plausible deniability though. It's not like his power is checked in anyway he can do what he wants.
You don't think he needs plausible deniability? Do you have any idea how international politics actually work? If he was proven to be murdering people, or if he outright admitted to it, it would cause universal international retribution against him which he absolutely doesn't want.
He annexed Crimea and is doing ok. Our intelligence community knows what he does. I really don't see your reasons for defending him.