Rituales de Sangre: The True Story Behind the Matamoros Cult Killings (2008)
Former Brownsville, TX, deputy sheriff George Gavito recounts the 23 grisly "palo mayombe" human-sacrifice torture-sex killings perpetrated by the gang led by Adolfo Constanzo in Matamoros, Mexico which ended in April, 1989 and are basis for the Zev Berman feature film Borderland (2007). Gavito was