Sergey Vladimirovich Cherkasov

Sergey Vladimirovich Cherkasov (), also known as Victor Muller Ferreira, is an alleged Russian intelligence officer working for the GRU, whose true identity was revealed by the Dutch General Intelligence and Security Service in 2022. He was first sentenced by a Brazilian federal court to 15 years in prison for using a forged Brazilian government-issued document, but the sentence was later reduced to 5 years and 2 months. Provided by Wikipedia