Question 1: The cause of death was a gunshot wound to the head.
Question 2: The manner of death was homicide.
Question 3: The pH of the body being normal indicates that the body was likely not deceased for an extended period prior to discovery, as normal pH levels suggest metabolic processes were still functioning at the time of death. A high bodily pH (alkalosis) could suggest certain medical conditions or prolonged survival post-mortem, while a low bodily pH (acidosis) might indicate death occurred in a state of respiratory or metabolic failure or prolonged exposure to the environment leading to breakdown processes.