The claim that a bolt in the wall of the van matches the neck injury to the spinal column.
Now let’s take a look at how this fits with the story told by the other prisoner.
If the driver of the van was doing a “ROUGH RIDE” and an injury was sustained to Freddie’s neck it would stand to reason that Freddie would want medical attention. If he could not speak because of a damaged voice box or larynx then his only other means of communication was to bang or pound on the walls of the van. As stated by the other prisoner Freddie was banging on the walls of the van.