Lol, Putin threatens Sergei Skripal in a video saying 'traitors will kick the bucket' and you cannot believe Putin would be behind the killing.
https://www.thesun.co.uk/news/5735518/vladimir-putin-choke-traitors-video-russian-spy-sergei-skripal-poisoning/
How come these poisoned people aren’t dying? You would be doing your research in Siberia for that in the old days.
Also remember what the CIA said. We can do things and make it look like others did.