His stage name is T.I. His birth name: Clifford J. Harris Junior. But for the next year, he will be known as federal prison inmate No. 59458019. The rapper is now behind bars at a federal prison in Arkansas — where he has begun serving a one year, one day sentence on federal weapons charges. T.I. arrived at the low-security prison in Forrest City inside a black conversion van with tinted windows. A prison spokeswoman says the prison will have no special protection set up for the rapper. The facility has double-bunked cells and a large fenced exercise yard.