Two charged with Nemtsov killing include former Chechen policeman

By Katya Golubkova and Jason Bush MOSCOW (Reuters) - Russian authorities said on Sunday they had charged two men over the killing of Kremlin critic Boris Nemtsov and said one of them was a former senior policeman from the mainly Muslim region of Chechnya who had confessed to involvement in the crime. Nemtsov was shot dead on the night of Feb. 27 within sight of the Kremlin walls, in the most high-profile killing of an opposition figure in the 15 years that President Vladimir Putin has been in po