Can I kill a burglar if I get the chance to?

Once you have been burglarized, you will have a completely different outlook on the subject. Having been burglarized twice, once the house, once the storage unit. We now have a fence, dog, and a security system. Retired, and living in a state that supports the Castle Doctrine, one of my fondest dreams is to be home when the next burglar drops by. Not a Christian attitude, but I will end his career permanently, and pray for forgiveness later. In your situation, calling the police may be the best of several bad choices. Good luck.