Watch: D4vd Case: Celeste Rivas Hernandez's Cause of Death RevealedContent warning: This story includes graphic details about a murder. More details about Celeste Rivas Hernandez's murder are coming to light. As D4vd-who pleaded not guilty to killing the 14-year-old and mutilating her body-remains in police custody in connection to her death, officials released Rivas Hernandez's autopsy report, determining that she died from "multiple penetrating injuries.