both scenes are a tough call...but on the first one, if i get a chance to see someone pointing a gun at me and firing and i am able he/she is going to get it right back, if i am able to fire and have not been injured. if the person was not shooting live rounds, then to bad. do not play games with people with weapons in their hands.
the second one where someone has broken into my house is different as i will
hopefully fire on them first and i intend to take them out, not just injure. i keep a 44 magnum short barrel by my beside. i also have other weapons throughout the house.
but i can bet others will have different views on this subject. but after having one house broken into and have been fired upon, i do not take it lightly.
also i would like to praise anyone willing to put on a police uniform and wear that weapon and badge and be a target for all the crazies out there. my hats off to you and your brothers and sisters doing a great job out there..