[Maceman]

Here in the States, the Castle Doctrine would preclude that from happening, since you have no duty to retreat from your home before defending yourself.

You do in Massachusetts.

[an amused spectator]

You do [have to retreat from your home before defending yourself] in Massachusetts.

Well, Massachusetts only momentarily detached itself from The King's Rule back in the day. It's right back to being a monarchy (the Kennedys and the Kerrys), taxing the crap out of anything that doesn't move and confiscating guns... ;-)