Father and stepmother are charged with torture after daughter, 11, is found dead, disfigured and 'deprived of an organ or a limb'
Authorities responded to a late-night 911 call and found an 11-year-old girl dead in Contra Costa County, California
Rene Diaz, 30, and stepmom Crystal Diaz, 29, are charged with torture, mayhem, and four counts of child abuse
The 11-year-old's cause of death is still undetermined, but authorities noted she had been extensively abused before her death
Court records allege the girl was tortured last November, and suffered extreme and cruel pain in the weeks ahead of her death