The impact of gun violence can leave a person traumatically scarred. Such situations lead topost traumatic stress disorder, PTSD.
A situation involving gun violence is always uncontrollable and situations which are uncontrollable have a high chance of leaving a person feeling helpless. In addition situations such a this which are usually unpredictable increase the level of fear and anxiety as though there is nothing that the person can do to help themselves.
With this is mind, health problems like high blood pressure creep in due to paranoia and depression setting in.