[Jorge]

Apparently, both the shooter and the deceased had bad judgement.

Exactly.

I've remember hearing a story about some kid who played a prank on his father, and scared him so bad the father accidently shot and killed him.

You never know how a "prank" might turn out.

[coloradan]

There was a 14 year-old girl who messed up her own house to make it look ransacked, like it had been burglarized, left the front door ajar, and then hid in a closet to wait for her father to come home. (It might have been his birthday, or something like that.) He gets home, sees the door open and the house a mess and pulls/gets his gun. She leapt out of the closet - Surprise! - and was shot dead by her dad. Innocently intended, but honestly, what was she expecting?