His job was to nurture the children in his care, to protect and educate them.

But behind closed doors, in dark corners and empty cloakrooms, teacher Paul Roger Herrick was a repeat and regular sex offender who abused little boys and girls to fulfill his "desires", silencing them with terrifying threats of violence over almost three decades.

Teacher Paul Roger Herrick started to sexually abuse boys and girls soon after he was certified in the 1960s.

It was easy to get them alone.

He'd tell them to stay after class, that they needed to be disciplined.

And once he got them alone he subjected them to, and forced them to participate in, disgusting and deviant sexual acts.

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Some of the children told their parents.

And some of the parents confronted the schools.

But those complaints were not actioned, and it wasn't until 1993 - by which time Herrick had been teaching across the country and held multiple

THE FIRST CONVICTIONS - PRINCIPAL'S 'FALL FROM GRACE'

ANOTHER COURTROOM, ANOTHER SENTENCE

MORE CHARGES - AND A COURT FILE OPENED

SCHOOLS TOLD, BUT HERRICK'S 'STATUS' MEANT SILENCE

WHO KNEW ABOUT HERRICK?

PAUL ROGER HERRICK - A TIMELINE OF TORMENT

SEXUAL HARM - DO YOU NEED HELP?