Unfaithful Wife (1986)

The film concerns Fidel's attempts to resume a regular life after the devastation wrought by his wife's death. He returns to his old friend Crispin and his wife Irene. A tentative effort with another woman fails, and Fidel finds himself in Irene's arms. That evening, a young girl is brutally murdered. Unable to account for his whereabouts, Fidel is named the principal suspect in the murder, which leads to his imprisonment. Crispin, meanwhile, learns of Irene's infidelity; his friendship is put to the test when Fidel escapes, gets wounded, and asks Crispin to kill him and put him out of his misery.