So are you saying that the murders are justified because of the past? I'm married to an Alaskan native man and I'm a "white" woman (actually I'm Italian and German but I'm American) I respect the Alaska native culture and am honored to one day have children who will have Alaskan native in their blood. Your statement is highly inappropriate!! People are in jail for committing crimes, this boy killed two men, who cares if they are white. He should and will go to jail. 
The way Alaska was "bought" yes was wrong, we should never forget about it, but two wrongs never make a right.