So, the shooter gets to have a full investigation although he admits to the shooting before he gets a fair trial, while the alleged thief doesn't even get the benefit of the doubt before getting shot.
That's summary execution. Plain and simple.
Yes he admits to the shooting. You are taking for granted that the shooting is illegal. Benefit of the doubt means that if it looks like it could have been justified, and the shooter says it was justified, then the police should believe them until they have evidence that contradicts this.
The home owner defending his family and property does not need to afford a criminal-in-progress the benefit of the doubt, but he needs to be reasonable and not overreact either.
The
justice system certainly owes the criminal that same benefit of the doubt in determining whether or not he was actually stealing. By the same benefit of the doubt afforded to the home owner, if the "thief" says he wasn't stealing, and there is no evidence to the contrary, then the police should not charge him either until they have evidence that he was stealing. IN this case, they had evidence that he was stealing which overrides the benefit of the doubt.
Perhaps you need a thesaurus, or to re-read my previous posts, but execution is a punishment, meted out for crimes after they have been committed. Self defense is about stopping the crime from proceeding any further.
If you were talking about a self defense regime where A) there was an automatic presumption of bodily harm from anyone unlawfully on property, and B) lethal force is always authorized regardless of what is actually necessary to stop the trespass/attack, then yes, trespassing could carry a de facto death sentence IF caught in the act. There are probably some people here on the forum would want such a regime, but personally I agree with you that this would be excessive and frankly UnCanadian, but that is not at all what we have now, or what we are talking about.