Two Sydney pedophiles working at high profile arts schools carried out heinous crimes against multiple children in their care, the child abuse royal commission has heard.
How those around them reacted to allegations of the abuse - and how authorities responded - is now the subject of public hearings which opened in Sydney on Wednesday.
Grant Davies co-founded prominent Sydney dance studio RG Dance with his sister Rebecca in 2001.
Davies is in custody awaiting sentence after pleading guilty in September 2015 to dozens of charges including having sexual intercourse with a child and using children to make pornography.
Three of his victims are expected to tell the commission of the inappropriate touching, indecent behaviour and sexually explicit conversations they were forced to endure.
The commission will also hear evidence of how Davies groomed his students through messages, affection and normalised sexual behaviour, counsel assisting David Lloyd said.
It will also hear how Davies groomed the children's parents, including one woman jailed for sending him sexually-charged photos and videos of her daughters.
Central to the hearing will be how staff and managers at RG Dance responded to multiple allegations against him.
"There will be a particular focus in this public hearing on what was known by staff and management of RG Dance about Grant Davies' behaviour towards children prior to his arrest in 2013," Mr Lloyd told the commission.
There will also be a focus on how NSW Police and the Department of Family and Community Services responded to child sex allegations made against Davies in 2007.
The inquiry heard the police investigation was closed in 2008 without charges laid, with Davies remaining at RG Dance until his arrest in 2013.
Professor Victor Makarov was employed as the head of the prestigious Australian Institute of Music's piano department when he abused several pupils.
One of Makarov's former students subjected to his sexual abuse is expected to give evidence.
The survivor, known as CAA, began studying at AIM in 1998 when he was about eight or nine years old.
Makarov taught the boy piano on-campus and from home for the next six years.
Mr Lloyd said CAA was persistently sexually abused by Makarov at the institute and inside the abuser's home over about 18 months from mid-2002.
Makarov was eventually arrested and charged in 2004 with a string of child sex offences against students.
Despite the charges, Makarov continued teaching at the institute until he voluntarily took leave in July 2004.
"After that leave, he continued to teach AIM students at his home, seemingly until he was convicted in December 2004," Mr Lloyd said.
The response of AIM in allowing Makarov to continue teaching minors after he had been charged, despite warnings from NSW police, will be examined by the commission.
The public hearing continues in Sydney on Thursday.
