A man who was charged with stabbing Bobby Brown's nephew at Sean "Diddy" Combs' Justin's Restaurant in Atlanta was shot and killed this morning.

Marque Dixson, 28, of Los Angeles, was shot following an argument with an ex-girlfriend in the city's Buckhead section around 3:00 am.

Dixson was allegedly associated with the record label Black Mafia Family (BMF) and was out on $50,000 bail after being indicted for stabbing Brown's nephew in May of 2005.

Rumors circulated the man shot was BMF artist Bleu Davinci, but sources told AllHipHop.com that Dixson was Bleu Davinci's younger brother.

The Atlanta Journal Constitution reported that Dixson argued with an ex-girlfriend early and left a local club called The Living Room.

His ex-girlfriend followed in another car and when Dixson stopped in the parking lot a Rooms to Go store, Dixson was shot to death.

Police are still interviewing witnesses, but late Thursday morning, Atlanta Police spokesperson Marion Lee said investigators were still trying to determine who did the shooting.

While details are still released, sources told AllHipHop.com that the ex-girlfriend allegedly shot Dixon to death in the parking lot.

Dixson was indicted in August of 2005 for stabbing Bobby Brown's nephew Shayne after an argument broke out between men in Brown's group and those with Dixson's entourage.

Two men in Brown's entourage were stabbed in the neck during the fracas, which broke out shortly after Brown gave an impromptu performance during an open mic night at Justin's.

Dixson was later indicted for aggravated assault and two counts of aggravated battery.

In Oct. of 2005, the DEA arrested over 30 members of BMF and seized over $3 million dollards in money, 2 kilograms of cocaine and various weapons.