That is preposterous. You can’t sow doubt on most logical explanation without offering an alternative. If it was somebody else, who and why? That is elementary.

You are buying the typical Russian narrative for which there is a even a phrase in Russian language along the lines of “it cannot be excluded”. Meaning anything that cannot be 100% excluded is possible and maybe even 10% possible. It is not. I did no kill him — that is 99.99% provable but not 100%. So maybe I did. But why and how?