A self-described gangster who police and prosecutors say masterminded the shooting death of Tupac Shakur in Las Vegas in 1996 is due to make his first appearance Wednesday before a Nevada judge.

Duane “Keffe D” Davis, 60, was arrested Friday during an early-morning walk near his home in suburban Henderson. A few hours later a grand jury indictment was unsealed in Clark County District Court charging him with murder.

Grand jurors also voted to add sentencing enhancements for the use of a deadly weapon and alleged gang activity. If Davis is convicted, that could add decades to his sentence.

Davis denied a request from The Associated Press for an interview from jail where he’s being held without bond. Court records don’t list an attorney who could comment on his behalf.