I did a search but couldnt find anything

[Alutacon]

Stand by for either link to , or posting of the Maryland Uniform Jury Instructions for this .

Short Answer is yes , with similar fine print as self defense .

Real world - You presumably know what's what with your Family . But a random 3rd Party is frequently not readily apparent what's actually happening , who's who , who's actually the bad guy or good guy .

If it's not a blatantly obvious Terrorism , or Active Mass Murderer , caution is usually wisest .

I agree with this. If you weren't there to witness the whole event as well be extremely careful. I can imagine a scenario where you could shoot someone who appeared to be committing a deadly assault only to later learn that they were the victim, were defending themselves, but just happened to be winning the fight when you came upon the scene.