NEW : Chechens protest killings of lawyer and journalist in Moscow . Attorney Stanislav Markelov killed in front of an office in central Moscow . He told the interviewer Russian President Vladimir Putin has ordered a probe into the killing, which he called " barbaric ". Markelov had opposed release of army colonel jailed for killing Chechen woman .
NEW : Chechens protest killings of lawyer and journalist in Moscow . Attorney Stanislav Markelov killed in front of an office in central Moscow . Russian President Vladimir Putin has ordered a probe into the killing, which he called " barbaric ". Markelov had opposed release of army colonel jailed for killing Chechen woman .