The fight allegedly started when Frost noisily slammed a metal gate outside of Ford's mother's house.
After yelling at Frost and his friends, Ford ran back into his mother's house and grabbed a kitchen knife, stabbing Frost in the heart.
Ford told police that he stabbed Frost in self-defense, saying the student was drunk and aggressive.
Ford is a former usher for University of Southern California football games. Frost was from Idaho and transferred to USC in hopes of becoming a film director.
