1x13 - The Alfred Hitchcock Hour

Robert Evans is a revivalist preacher who is desperate for money to build his own church. He romances a rich woman named Naomi Freshwater and kills her. Some time later, Robert meets Naomi's neice Laura. He tries to romance her as well, but she is not interested. When Laura discovers that Robert killed her aunt, the preacher kills her and stuffs her body in a trunk. He drags the trunk to a pit and sets it on fire. Later, as Robert is delivering a sermon, it begins to rain. The rain puts out the fire and the contents of the burned trunk are revealed. Robert is promptly arrested and charged with murder.