It took the jury six hours to find Adrian Trevor Moore guilty of all 87 charges relating to the pattern of abuse, which spanned over a decade. 

The five-week trial heard from all 13 victims and the court was played videos Moore recorded of his vile and degrading acts – which included bestiality.

Two of his victims were fellow police officers and many were unaware of what Moore had done to them.

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Judge Alan Troy told the court he “greatly regretted” the jury had to see such graphic and confronting imagery, but it was “utterly unavoidable”.

He said Moore’s crimes “involve a degree of sadism that is unprecedented in my experience”.

The 52-year-old will be sentenced in December.