Tekashi 6ix9ine appeared in court and pleaded not guilty of retaliation charges and firearms.
The rapper was arrested earlier this month and could face a minimum of 32 years in prison.
The trial date was set for September 4, 2019 and will remain in custody, although it is unclear for how long.
It all comes from his involvement in a violent band in the US.
Nine Trey Bloods are a New York band and also known as TreyWay, which 6ix9ine said on Twitter.
The rapper was accused of six offenses including racketeering, carrying a firearm, assault with a dangerous weapon, and conspiracy murder charges.
Racketting is when people use criminal actions to repeatedly take money from others, and most likely associated with rocket protection.
TMZ previously reported that 22 years of age was denied bail, despite the fact that his lawyer offered $ 750,000 and home arrest.
The Brooklyn rapper avoided jail time for previous allegations, including child crimes in 2015, but experts believe racking charges could mean a long spell of jail for the star.
"In the history of the United States, the only thing that seems to make someone shut up is rachetera, money laundering or tax evasion," British writer hip-hop and culture Jesse Bernard previously told Radio 1 Newsbeat.
Adding: "This could be what leads him to jail".
Despite being behind bars, 6ix9ine still made titles.
Just before Thanksgiving, he was transferred to a new prison for "security reasons".
His lawyer, Lance Lazzaro, said it was because he received threats from other gang members in the Metropolitan Detention Center.
His debut album, which includes both Kanye West and Nicki Minaj, was scheduled to be released on Friday, was postponed.
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