Russia has announced a reward of 45,000 euros for information leading to the conviction of the killer of opposition figure Boris Nemtsov.<br /><br /> Supporters of the 55-year-old claim he died because of his fierce criticism of Vladimir Putin and for slamming the war in Ukraine as Russian “aggression”. <br /><br /> Investigators are examining security footage, some of which has been shown on Russian television.<br /><br /> Nemtsov is seen walking with his girlfriend, and another person is then seen running from the spot and getting into a car that stops nearby.<br /><br /> Russian authorities are promising a full investigation to hunt down the killers, but the opposition is voicing scepticism that the truth will ever be uncovered.