The man who prosecutors say killed Tupac Shakur will face the rest of his life behind bars. Duane “Keefe D” Davis was officially sentenced for his role in Tupac’s murder. Davis is going to prison for 40 years to life. He was sentenced to 20 years to life for the first-degree murder charge. Subsequently, he received 20 years to life for the deadly weapon enhancement. These sentences are to run consecutively. Judge Carli Kierny made it clear that this sentencing was 30 years in the making.