Of course not, Putin is not an idiot and wouldn't leave a trail to him after ordering someone killed on British soil. There is no doubt about Lugovoy or Kovtun's involvement, but directly or indirectly Putin is responsible for his agents running around poisoning people with polonium (edit: not plutonium!). The fact they are refusing to extradite them is telling as well.
>Putin is not an idiot and wouldn't leave a trail to him after ordering someone killed on British soil.
Perhaps but that's not evidence.
>There is no doubt about Lugovoy or Kovtun's involvement, but directly or indirectly Putin is responsible for his agents running around poisoning people with plutonium.
That's not evidence either. Besides, they were ex-KGB / FSB agents.
>The fact they are refusing to extradite them is telling as well.
Let's reverse this. Would Obama agree to extradite a Republican ex-CIA agent with powerful friends who flew to Moscow and killed Edward Snowden without his knowledge?
Can you imagine what the political fallout would be if he did? He'd be characterized as a mixture of powerless, hypocritical, traitorous and anti-American all at once by both friends and enemies. Political suicide at worst; own goal at best.