He used the gun in self-defence

[Twilit1988]

My respected teacher

He used the gun in self-defence and the thief was killed.
He regrets now but it's said "It's no use crying over spilt milk"
The theif said after getting shot that he was sent to your house. Said Dr. Ishaq.
Who sent him?Who's the arch-enemy of Dr. Ishaq? Nobody knows
If the thief were alive we'd have known that. Or if the thief were alive we'd know that. ?

Thanks in advance!

[Mister Micawber]

What is your question?
_________________
Native English teacher at Mister Micawber's

[Foah]

[Mister Micawber]

Oh, is that your question, Twilit? Then these are correct:

If the thief were alive we'd have found that out.-- find that out at that time
If the thief were alive we'd know that. -- know that now.

_________________
Native English teacher at Mister Micawber's