Final answer:
The cause of death for Raul's father is "multiple gunshot wounds to the head," according to the medical-legal autopsy findings, and it is classified as a homicide.
Step-by-step explanation:
The cause of death in the case of Raul's father is "multiple gunshot wounds to the head." An official death certificate stating the cause of death as homicide confirms that the injuries were inflicted by another person with the intent to harm or kill. In forensic terms, the cause of death refers to the specific injury or disease that leads to the cessation of life. In this scenario, the multiple gunshot wounds to Raul's father's head were so severe that they were non-survivable, which directly led to the loss of life and this would be the cause mentioned in a medical-legal context.