Kadyrov is one of the most powerful figures in Russia, and a close ally of President Vladimir Putin
...Second and fourth President and sixth of the Russian Federation and the first to remain sober. Putin is credited with bringing political stability and re-establishing something like the rule of law, which occasionally results in somebody dropping dead from polonium poisoning. Under Putin, a new group of business magnates controlling significant swathes of Russia's economy has emerged, all of whom have close personal ties to Putin. The old bunch, without close personal ties to Putin, are in jail or in exile or dead.... Under their unwritten pact, Kadyrov keeps order in a region that has been notoriously unstable, and in return, he gets free rein to be heavyhanded with any local opposition to his own rule. Some worry that the Chechen leader is transforming the republic into a place where dissenters are punished and Islamic law is used for oppression rather than religion.
At one point in his Instagram post on Sunday, Kadyrov says: "US intelligence agencies, who were accused of involvement in the Boston tragedy, had to find a victim. Tsarnaev was handed to them as a victim." Later, speaking about Dzhokhar and his older brother Tamerlan, who died in the police chase following the bombing, Kadyrov writes: "If they actually did that attack, I don't believe the US special intelligence services didn't know about it." Kadyrov is close ally of Russian President Vladimir Putin
Dzhokar is from a family of ethnic Chechens who were forcibly removed from the Russian province in the years after WWII and resettled in the then-Soviet republic of Kyrgyzstan. In 2002, his immediate family gained political asylum in U.S. They had sought to return to Chechnya, but Russian authorities prevented them from returning to the Russian republic, which was ravaged by war and had become a hotbed of radicalism. Tamerlan Tsarnaev had made two visits to Chechnya in the years leading up to Boston bombing, and some believe those trips fed his growing radicalization.