A former colonel in the Russian Army has been gunned down outside an apartment block in Moscow.
Investigators say an unidentified assassin shot Yuri Budanov in the head before fleeing in a car.
Budanov was well-known. In 2003, he was convicted of strangling an 18-year-old Chechen girl who he thought was a rebel sniper.
He was one of only a handful of Russian officers prosecuted over what campaigners say were widespread abuses during the two separatist wars in Chechnya.
His release in early 2009 after nine years of a ten-year sentence sparked protests in Grozny.