Haiti murder rate: 219 Norway murder rate: 0.56 . Haiti GDP per capita: $740. Norway GDP per capita: $71k
Why are you making a comparative statement of murder rates between different countries?
I am trying to prove that the people of the  poorest country in the world are killing each other
You are making a stereotypical statement by saying that just because a person comes from a poor country that they are a murderer. Look at the facts regarding other poor countries because not all poor countries have such high homicide rates.