Knox Grammar has been the scene of multiple instances of child sexual abuse, particularly in the 1980s.

Adrian John Nisbett.

These included the indecent assault of four students aged 11 to 13 by former teacher Craig Treloar between 1984 and 1987.

In 2009 and 2010, Treloar, Adrian John Nisbett and two other teachers pleaded guilty to abusing students.

Some had continued to teach at the school for decades after the attacks took place.