NEW : Many fellow Bolshoi dancers signed a letter asking the judge for leniency for Dmitrichenko . Dancer Pavel Dmitrichenko is given a six-year prison term for masterminding the attack . The Russian government has said it will not extradite him to face trial in Russia because he was granted asylum by Ecuador and cannot be sent back there. The acid attack almost blinded the Bolshoi Ballet 's artistic director , Sergei Filin . The case has exposed rivalries and tensions at the world-renowned ballet company .
NEW : Dancer Pavel Dmitrichenko is given a six-year prison term for masterminding the attack . The Russian government has said it will not extradite him to face trial in Russia because he was granted asylum by Ecuador and cannot be sent back there. The acid attack almost blinded the Bolshoi Ballet 's artistic director , Sergei Filin . The case has exposed rivalries and tensions at the world-renowned ballet company .