 will almost certainly have two of the many symptoms that are associated with it. One of them is sleep disturbance, which may take, the simplest version is going to be insomnia for a period of time after the incident. The simple reason being, why did you shoot this guy? He was trying to kill you. You've just been through a near-death experience. It triggered that whole epinephrine dump of the so-called fight-or-flight response.