Naude, wearing a grey suit and burgundy tie, was ordered to pay attention by the judge as he looked down at a folder of evidence while he was sentenced.
Judge Goldstone said: “Having seen and heard you during the trial, I am wholly persuaded that you do not, even now, have any inkling or appreciation of the extent of your perversion or of the psychological harm and damage you have caused.”
He said Naude, of Market Drayton, Shropshire, was “out of control” with an “insatiable appetite” for young girls and described a selfie he took after raping his victim as showing his “smug self satisfaction and total lack of shame”.
Naude, who was based at Crewe police station, had denied rape, telling the jury the sex was consensual.
Other parents said their daughters had gone on to self-harm after being groomed online by Naude, who would blackmail and threaten his victims, persuade them to send pictures of themselves undressed, tell them to call him “daddy” and send them videos of himself masturbating.
Naude, who was suspended and dismissed by Cheshire Police following his arrest, was also found guilty by a jury of four charges of attempting to arrange commission of a child sex offence and one charge of arranging commission of a child sex offence.