Litvinenko was killed by the Russian authorities

The Russian authorities did not provide sufficient evidence of their innocence in the death of Alexander Litvinenko. This is the conclusion reached by the European Court of Human Rights.
Origin source
The court in Strasbourg considers that Russia has violated Article 2 of the European Convention on Human Rights - “The Right to Life”. He decided to pay the widow of a former FSB officer Marina compensation in the amount of over 100 thousand euros, as well as cover legal costs for 22.5 thousand euros.

Meanwhile, the ECHR judge from the Russian Federation Dmitry Dedov argued that the investigation carried out in Britain "raises reasonable doubts about the involvement of the suspects in the poisoning."

The widow of Alexander Litvinenko filed a lawsuit with the ECHR in November 2020, demanding that the Russian authorities pay her 3.5 million euros. She believes that her husband was poisoned with "prohibited chemical weapons."

We will remind, Litvinenko received political asylum in Britain and died in 2006 from poisoning with radioactive polonium. London blamed the murder on State Duma deputy Andrei Lugovoi, who met with Litvinenko shortly before his death. The Kremlin denies any involvement in the death of an ex-FSB officer.