Litvinenko was murdered because he named the KGB as the sponsors of al-Qaeda and all the terrorism in the world from The Jackal to al-Zawahiri and because he went on Russian TV and accused Putin of crimes. He was working with Berezovky and others who owned TV stations that weren't government controled to maintain the little bit of democracy that existed under Yeltsin. Sadly they failed.
If it was a smuggling operation why would Litvinenko drink it? Handling it doesn't kill you!
Litvinenko was murdered because he named the KGB as the sponsors of al-Qaeda and all the terrorism in the world from The Jackal to al-Zawahiri and because he went on Russian TV and accused Putin of crimes.==
Litvinenko affiliated himself with chechen terrorists. His friend who he met frequantly was Akhmed Zakaev. Litvinenko turned to Islam and was burried in the Muslim cemetary.
What he accused Putin is that he brutally eliminated the Chechen insurgents in Chechnya. As for me I bless Putin for that together with 70% of voters.
The Berezovskii is the just swindler and thief well known in Russia (just one example: LogoVAZ swindle in 1990th). He firstly supported Putin thinking Putin i return will support his swindler business but he mistook Putin. So he hates him for that very much.