Jeffery Lamar Williams, who performs as Young Thug, was arrested at his home in Atlanta on Monday, according to police. He was booked into the Fulton County jail and charged with conspiracy to violate the Racketeer Influenced and Corrupt Organizations Act (RICO) and participation in criminal street gang activity.

According to the indictment, Williams along with 27 associates of the enterprise Young Slime Life, “conspired to associate together and with others for the common purposes of illegally obtaining money and property through a pattern of racketeering activity and conducting and participating in the enterprise through a pattern of racketeering activity.”

Among Williams’ alleged associates named in the indictment is fellow rapper Gunna, whose real name is Sergio Kitchens. Kitchens has also been charged with conspiracy to violate RICO, according to the indictment. As of Tuesday morning, Kitchens was not in police custody, police said.

In the indictment, prosecutors said Williams along with two other defendants founded the gang YSL in late 2012 and claimed to have affiliations with the national Bloods gang.