Retreat Through the Wet Wasteland (1973)

A group of burglars in black tights breaks into a church to commit robbery and commits outrages upon the pastor's young daughter. After some time, Detective Harada and his squad rush/came back to the church they robbed earlier. In the duty station, the police chief informs Harada that his ex-colleague, Nakamura, has escaped from a mental hospital where he had been hospitalized for insanity. Harada and his partner, Kato, are assigned to pursue Nakamura on the run. If Nakamura's insanity turns out to be false, the cop buddies must terminate him and masquerade it as self-defense.