Johnson was one of three men arrested for the crime.
After sitting in jail for three years on first degree rape and murder charges, his friend Kenneth Meeks admitted he pulled off the crime single-handedly. Meeks is now in jail for life.
But Johnson still stands accused of accessory after the fact to first degree murder. He says he was taken to the crime scene, Willis' car and in fear for his life helped Meeks clean it up. Johnson went to police three days later and told them what had happened.
The defense says they will argue that Johnson did the right thing by coming forward.
However, the state thinks he should still be punished and it has a list of witnesses ready to help argue that point.