Leon Trotsky, The Struggle Against Fascism in Germany, New York: 1971. Page 147, Cited in Audrey Farrell, Crime Class & Corruption: The politics of the police. London: Bookmarks, March 1993. Page 88:
The fact that the policeman was originally recruited from [the ranks of]… workers is absolutely meaningless. Consciousness is determined by environment. The worker who becomes a policeman in the service of the capitalist state is a bourgeois cop, not a worker.