You can't kill someone for stealing (or attempting to steal) your stuff.  Even if they are drunk.  Even if there have been a lot of thefts from farms in your area.  But the defence never claimed it was self-defence. 
 
Stanley shot Boushie in the back of the head.  I think either he was angry/scared and in the heat of the moment, shot him OR he was careless and pointed the gun directly at a person when he only wanted to fire warning shots. 
 
To me, that makes him guilty of something.  I haven't followed the case well enough to guess whether the crown did a bad job, the jury made the wrong call, or whatever. 
 
I grew up not far from where this happened and there are definitely racial issues just below the surface (and sometimes above).
		 
		
		
		
		
		
		
		
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