(b) The correctional officer is examined and subsequently diagnosed with such disorder by a licensed psychiatrist who is an authorized treating physician as provided in chapter 440 due to one of the following events:1. Being taken hostage by an inmate or trapped in a life-threatening situation as a result of an inmate’s act;
2. Directly witnessing a death, including a death due to suicide, of a person who suffered grievous bodily harm of a nature that shocks the conscience;
3. Directly witnessing an injury, including an attempted suicide, to a person who subsequently dies before or upon arrival at a hospital emergency department if the person was injured by grievous bodily harm of a nature that shocks the conscience;
4. Participating in the physical treatment of an injury, or manually transporting a person who was injured, including by attempted suicide, who subsequently dies before or upon arrival at a hospital emergency department if the person was injured by grievous bodily harm of a nature that shocks the conscience;
5. Directly witnessing a homicide regardless of whether the homicide was criminal or excusable, including murder, mass killing, manslaughter, self-defense, misadventure, and negligence; or
6. Seeing for oneself a decedent whose death involved grievous bodily harm of a nature that shocks the conscience.