The director of an agency that organised acting classes for young models with sex offending former Shortland Street star Rene Naufahu was shocked when she learned of his "predatory" behaviour.
And she is urging others in the modelling and entertainment industry to speak up about abuse or behaviour that makes them uncomfortable.
She said he was a predator and his actions were "shocking".
"He made them feel like it was their fault, like what he was doing was normal and they were wrong," she said.
"He used his power and manipulated them and that's what these predators do - case in point, Harvey Weinstein.
"I think he's just a horrible, horrible person."
She said any person in the entertainment or modelling industry - either experienced talent or those new to the scene - should speak up about inappropriate behaviour without fear.
"If you're ever feeling uncomfortable stop what you are doing and leave, or call someone and tell them," she urged.
The director said predatory behaviour was not limited to men in the industry - she is also aware of women behaving sexually inappropriately.
"I've heard weird stories about weird things that go on in this industry and it's just wrong," she said.
She assured victims that they would be believed and listened to.
"For us, it's so important that we've got a safe environment."
The director wanted to make very clear that she did everything she could to protect and support the victims - and to prevent future victims - as soon as she became aware of the full picture.
"People have tried to point the finger and blame us for Rene's wrongdoings but those classes were in his own personal time and we had nothing to do with it - we had absolutely no idea this was going on.
"This is the only time I will ever speak about this, because it's got to stop."