The Devil's Candy

The film starts with Ray Smilie (Pruitt Taylor Vince) hearing a voice late at night, to which he reacts by playing an electric guitar in a very loud manner, in front of a crucifix. A woman enters his room, unplugs the guitar, and after he acts awkwardly, she tells him to return to the hospital. After storming out, Ray continues to hear the voice and kills the woman, who falls down the stairs. Shortly after, a man is shown entering the house and staring horrified at the dead woman on the floor. Read more on Wikipedia.