Plumbum, or Dangerous Game (1986)

A straight-A student, Ruslan Chutko, obsessed with the desire to cleanse the city of criminals, joins an operational squad. But gradually, he himself becomes a destructive force, bringing people nothing but evil - because he lives by the principle "the end justifies the means." But one day, during a raid on poachers, his father turns out to be among the offenders...