Robert Allen, Dedrick Devonshay Williams and Michael Boatwright, all 22, were arrested earlier in connection with the case.
Newsome has been charged with first degree murder and robbery with a deadly weapon. Deputies said Newsome and three other suspects robbed the rapper, stealing his Louis Vuitton bag that had $50,000 in cash inside.More news: Red Dead Redemption 2 Gameplay Video Will Be Revealed Tomorrow
The Broward County Sheriff's Office said in a statement Tuesday evening that 20-year-old Trayvon Newsome was taken into custody after surrendering at his lawyer's Fort Lauderdale office around 5 p.m.
The rapper had signed a deal worth $10 million with music distributor Empire to release his next album, according to the New York Times.More news: Veterinarians ready for efforts to save ailing orca whale
XXXTentacion died on the 18th of June at the age of 20, when two armed suspects shot him while he was shopping for a motorcycle.
The rapper is said to have placed the cash inside of a Louis Vuitton bag, which four suspects robbed from him at a vehicle dealership called Riva Motorsports, before fatally shooting him.More news: Mauricio Pochettino hails Tottenham Hotspur's Academy after successful USA tour
The police are still investigating what exactly happened, why and who is to blame.
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