I've tried to tease that apart and failed. All of the sites hosting statistics I could find count suicide and justifiable homicide as in self defense in the statistics as homicide. I wish I could find a trust worthy source that differentiates in a truly unbiased scientific manor.

Could start with high profile assassination attempts by non-state actors. Trump - gun x2, Kirk - gun, Reagan - gun, Kennedy - gun, Kennedy - gun, Abe (Japan) - gun, Abe (Union) - gun, Bush - shoe.