On 1 November 2006, Litvinenko suddenly fell ill and was hospitalized. He died three weeks later, becoming the first confirmed victim of lethal polonium-210-induced acute radiation syndrome. Litvinenko's allegations about the misdeeds of the FSB and his public deathbed accusations that Russian president Vladimir Putin was behind his unusual malady resulted in worldwide media coverage.
The British Government has completed an inquiry into this matter:
The Litvinenko Inquiry
Report into the death of Alexander Litvinenko
Chairman: Sir Robert Owen
Here is the PDF – 329 pages.
I don’t know if Putin was involved; I don’t know that he wasn’t. If he was, this wouldn’t be the first time a world leader had an enemy done in. If he was, I am not sure why he would bring extra attention to the assassination via the use of a rather unique method. What about a simple car accident, for example?
This report by Sir Robert Owen does not really answer the question:
The FSB operation to kill Mr Litvinenko was probably approved by Mr Patrushev and also by President Putin.
Not that I have read it. I offer the following – a simple search on the frequency of various terms in the report:
Probably = 34 times
Probable = 3 times
Could = 150 times
Might = 86 times
Possibly = 11 times
Possible = 99 times
Apparently = 15 times
Presumably = 5 times
Perhaps = 34 times
I could go on. You get the point.