The public often mirroring the perspective of the media, may demand explanations regarding the incident which places your entire agency under scrutiny. The decedent's life is discussed on the six o'clock news with the media interviewing a traumatized and often angry loved one. You look over the scene in disbelief and begin the process of self-evaluation. It is inevitable. Intellectually you know that your actions are justified.
Emotions are another thing.
As Chief Medical Examiner for the County of Los Angeles, Dr. Karl Harris reviewed cases of officer involved shootings to determine what actions, if any, the decedents may have had in precipitating their own deaths. For suicidal subjects, Dr. Harris found that in some cases the intended method of suicide was a police officer. In other words, an armed suicidal person confronted a police officer in such a way as to force the officer to take a self-defensive action. It is not uncommon to later find that the weapon used by the suicidal subject was unloaded or nonfunctioning. I remember the terror during the incident and the agitation afterwards.