[4] Knyazev was promoted to leading the criminal investigation department of the Kyiv metropolitan region in 2008.

[4] In December 2014 he was awarded the Order of Danylo Halytsky "for courage and heroism in defending the sovereignty and territorial integrity of Ukraine.

[4] Starting in November 2016 Knyazev was appointed head of the Criminal Investigation Department of the National Police of Ukraine.

[2] Knyazev tendered his resignation on 24 September 2019 during a press conference,[5] one day after his ex-wife was caught at the Polish border with her employer Vadym Kahan and 500,000 euros.

[6] On 26 September 2019 Knyazev was appointed an official adviser to the Minister of Internal Affairs, Arsen Avakov.