Complaints against three North East police forces have risen in the last year. Durham Police saw an increase of 22%, Northumbria of 12% and Cleveland of 2%.
Cleveland Police had the highest number of allegations in the country, relative to its size, with 378 allegations recorded for every 1,000 employees, followed by North Yorkshire Police.
"While we have seen an overall increase in complaints and allegations made, it’s important that people come forward so that we can learn the lessons from their experiences and improve our service to members of the public. We expect our officers and police staff to deliver a service with high standards of integrity and professionalism, and when this is found not to be the case, appropriate action will be taken."
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Sandiford, a former legal secretary originally from Redcar, was convicted of drug smuggling offences and sentenced to death in 2013.
Durham Crown Court heard that one of the male victims suffered a triple-fractured jaw, while left lying in the gutter, unconscious.