My feelings as well kryil.
The Superintendant and the Sherriff's department acted when presented with the evidence, which is credit to them. If they had been as corrupt as this officer, they could have easily disposed of this evidnce.
But this is yet again, another example of too much power. Without that evidence, Campbel would have denied it all.
Granted, prisoners are notorious for making false claims about officers. The prisoners don't generally, accept their crimes. They are a difficult group to deal with.
Equally, with welfare staff, another, possibly related group, who frequently have too much power, the excuse is the complaient is looking for compensation.