Can a charge be bound over from the Preliminary to General Sessions when no evidence proving the accused committed the crime?

At a preliminary hearing, a man was accused of attempted murder and possession of a weapon during a violent crime. The judge was switched out at the last minute before court began. While the accused and alleged victim "av" clearly stated there was a confrontation, both stated, along with two other witnesses, there was no gun involved and a shooting did not occur. The av did have injuries to their mouth so a nurse called the police as a suspected shooting.A doctor never confirmed the suspicion of a gun shot.The police decided that it would be a shooting, even though 4 witnesses, including av, clearly said there wasn't a shooting.There was no gun, shells, or ballistics recovered.The av refuses to testify saying that they already gave their statement 3 times and they choose to come to their own conclusion.There is one witness that waited 3 days to give a statement and it reflected what the officers claimed and is a known narc. Av is not pressing charges for the assault.