Manuel Ortiz died instantly from a bullet to the head at about 6am on New Year's Day after partying all night.
Family and friends of the 22-year-old wept as his body was carried from his flat in Phoenix, Arizona after the shooting.
Police said Ortiz and sister Savannah Ramirez returned to the home they shared early on Monday after spending the night drinking.
They were with two other people when one person pulled out a gun and they started playing with it for Facebook photos.
As Savannah, 19, posed with the weapon it went off, according to US media reports.
It is not known if the group were aware that the handgun was loaded.
Police say Savannah has been questioned and released pending further investigations.
Sgt Steve Martos said she would likely be charged with manslaughter if tests conclude she had alcohol in her body.
Idiots. I do not feel sorry for them.
__________________
Quote:
Originally Posted by Ric "G.O.D." Flair
"Hogan, You and I are gonna talk out here tonight, Because brother, I'm pissed off. And you don't want to piss off someone wearing a thousand dollar shirt, two-thousand shoes, a five-hundred dollar gator belt, and just happens to have 2 Hall of Fame rings. You don't not want to piss off the Wrestling God, the one and only, Nature Boy, Whoo!"