Yes, the similar link was on the post #19. However, we can question Litvinenko since he is a close associate of Berezovskiy--now exiled Tycoon who was suspected as one of the masterminds behind Putin ascendance to Power. I don't think being simply opponent of Chechen war or Putin position as FSB director is enough reason to murder him. More likely that he may knew too much.
Again--we are just speculating--I believe someday truth will be known, but I doubt that we know it soon.
That's nice, it's called opinion and the guy was no general, he was removed 8 years ago and did not obviously have government backing or protection.