text:  His appeal's been turned down, and Oleg Orlov, 71 years old, will have to serve his two-and-a-half-year sentence in a penal colony. A linchpin of the now-banned rights group Memorial, Mr. Orlov is in prison for discrediting Russia's armed forces. He'd accused Moscow of the mass killing of civilians in Ukraine and of descending into fascism. Vladimir Putin's Russia denies targeting civilians in its war on its neighbour.