Politkovskayas colleagues on Novaya Gazeta include notorious pro-American commentators like the independent Moscow-based defence analyst, Pavel Felgenhauer, whose also works as a columnist for the Jamestown Foundation: the Director of that body, Glen Howard, is Executive Director of the American Committee for Peace in Chechnya, a neo-con outfit which campaigns for a political settlement with the terrorists in that North Caucasus province of the Russian federation. This may explain why you can find only one opinion about Politkovskaya in the Western media. At the same time, by contrast, there is a huge variety of opinions about her murder in supposedly dictatorial Russia itself. The theories now circulating in Moscow about Politkovskayas murder include (apart from the claim that the Russian government or the Chechen authorities were responsible):
http://en.wikipedia.org/wiki/Anna_Politkovskaya
More questions there too.
The last was a top official, he was fighting successfully against crimes in an important branch of economy
Politkovskaya reported on alleged crimes committed by Russian military in Chechnya. Did they commit crimes? Probably. Do I care? No. Given the situation that was in Chechnya it was natural whatever European arm chair moralists cry out. They don't know who the Chechens are, that there have been war and no effective law enforcing, they have forgotten that the Chechens terrorists routinely kidnapped Western (and Russian, of course) nationals after 1995 for ransom, that they tryed to invade Russian Dagestan after a peace treaty that they tried to install the Sharia law in Chechnya. They also forgot how the Chechen terrorist treated non-Chechen population in the beginning of the nineties and so called "Chechen avizo" story, Chechen slave-owning and etc.
Kadyrov's authority and governing practice exactly fits the the Chechens. The Putin's policy in Chechnya could be erroneous because everyone can make mistakes but definitily not stupid.
Some people just don't understand that sometimes you MUST kill and oppress because they're used to live in a "garden".