NEWORLEANS- What was a large, but peaceful gathering of more than 200 people celebrating the graduation of a young man who was top 10 in his class ended with a shooting that left 7 people injured and the graduate's 15-year-old half brother dead.

Tremaine Robertson, 15, of Houston, was identified as the victim. He was standing next to his half-brother, the 17-year-old graduate celebrating his accomplishments.

Despite the size of the party, neighbors in the 6200 block of Eads Street in Gentilly said the music wasn't too loud and the gathering was fun and peaceful, until...

'When Iheard the pow-pow-pow, I said, 'Oh my God, they're shooting outside,' said neighbor Sandra Marshall. She said the family and their children are good kids that she couldn't say anything bad about.

Police said the incident occurred about 11:20 p.m. and some in attendance said it began with an argument.

Several shots rang out.

Four women, ranging in age from 19 to 30, were shot. One of the female victims had surgery for her injuries. The other three suffered non life-threatening gun-shot wounds. Three men, ranging in age from 22 to 25, were also shot and suffered non life-threatening injuries.

Detectives are still trying to determine a motive and identify a suspect. If anyone has information regarding this case, please call CRIMESTOPPERS at 822-1111. The lead homicide detective is Charles Hoffacker.

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