Pictured: The violin teacher accused of sexually assaulting six-year-old

A one-time musical prodigy remains behind bars tonight accused of indecently assaulting a six-year-old girl who he was teaching to play the violin.

The young student told her family of the alleged assaults after seeing the 21-year-old accused at the supermarket.

Oscar Ahn faced court on Saturday charged with 20 counts of indecently assaulting a six-year-old girl.

Abuse allegedly carried out over 10 months of violin lessons at a daycare centre in Sydney’s north west.

Oscar Ahn has been accused of sexually abusing a six-year-old girl. Source: 7 News

The court heard that Ahn has made startling admissions to police about his actions he says he has “demons”.

Among texts Ahn allegedly sent to his employer was a confession: “Yes I did touch (the victim)”.

His lawyer Greg Meakin said outside the court: “There’s nothing that I can say at this stage”.

Today, the childcare owner told 7News: “It’s a very sad thing… it is a very horrible experience for us”.

The victim’s parents confront Ahn at a Costco in Sydney’s west.

The little girl cowered during the chance meeting, telling her parents what happened.

Ahn told police yesterday that had it not been for that encounter he would have continued offending.

He will be back in court next month.