 Sergey Lapin (police officer)

Sergei (Sergey) Lapin, also known by his radio communications call sign Kadet ("Cadet"), is a former Russian police officer who had served in Grozny, Chechnya as a Lieutenant in the OMON (special police detachment) from the Khanty–Mansi Autonomous Okrug.He has been convicted for the torture and "disappearance" of a Chechen student.