Final suspect arrested over rapper's death

Trayvon Newsome and three other men are accused of shooting dead XXXTentacion in June

The fourth suspect in the shooting death of emerging South Florida rap star XXXTentacion has turned himself in to authorities.

The Broward County Sheriff's Office said in a statement Tuesday that 20-year-old Trayvon Newsome was taken into custody after surrendering at his lawyer's Fort Lauderdale office.

Newsome and three other men are accused of killing XXXTentacion in June.

The 20-year-old rap star, whose real name was Jahseh Onfroy, was fatally shot as he left a motorcycle dealership.

Officials said a struggle ensued when the rapper's sports car was blocked by another vehicle, two masked gunmen approached and shot XXXTentacion multiple times. The gunmen fled with a Louis Vuitton bag containing $US50,000 ($A67,355).

Newsome was booked into Broward County's Main Jail on charges of first-degree murder and robbery with a deadly weapon.