Harp Brothers (2020) is a Horror, History, Crime film that follows a film about America’s first serial killers. These brothers terrorized Kentucky and went across the state on a killing spree. The film is loosely based on the true story of the brothers. Filmed in historically accurate locations. Harp Brothers is not currently listed with streaming providers in your selected region, but availability can change over time. Fans of horror movies may also want to explore similar titles below.