Depends on the jury you get. In Calgary back in the 1980's we had two stand-out incidents:
1) A drug store owner, after suffering a string of armed robberies, chased a drug addict who robbed him out into the street and gunned him down with a shotgun;
2) A 98-pound weakling of a drug addict who owed money to a dealer was assaulted by a steroided-up goon who the dealer sent to collect. He shot the juice monkey a point-blank range and killed him.
In both instances the accused were found not guilty of murder.
I'm not sure what the lesson here is but it's not an automatic conviction, at least not with a jury. So we're not at the same place Britain tragically is at, where thanks to Tony Blair's government, even the slightest hint of self-defence (even in a potentially lethal situation) will be met with public prosecution and a jail sentence. Canada seems to be occupying that safe middle ground between a lunatic's paradise in the US, where the likes of inept vigilantes like George Zimmermann can escape prosecution if the good ol' boys circle the wagons around him (face it, if it weren't for the media frenzy Zimmermann would still be walking around free right now) and the insanity of Britain where criminals have all the rights and their victims have literally none.
And that Stand-Your-Ground nonsense in Florida that encouraged George Zimmermann to behave so stupidly? Turns out it applies to
white males only.