Update - December 13, 2018: Peter Thimio was found not guilty on all counts on April 13, 2015.

The owner of a popular Toronto swimming school has been arrested and charged with sexual assault.

Police say between July 2010 and July 2011, Peter Thimio, owner of Big Pete’s Swimming School, allegedly sexually assaulted a 15-year-old female employee of the school.

The 33-year-old is charged with sexual interference, invitation to sexual touching, sexual exploitation and two counts of sexual assault.

Const. Tony Vella said the victim only recently came forward, asking police to look into the matter.

“As a result of the investigation he has been charged,” he said, adding police believe there may be more victims.

Big Pete’s Swimming School operates in four locations in the GTA: Graydon Hall Manor in Don Mills, Good Life Fitness at 185 West Mall in Etobicoke, Bramalea City Centre in Brampton and the Good Life Fitness at Dufferin St. and Finch Ave. W.

Thimio’s website says he’s been a master swim instructor for 13 years.

In 2011, he made Star headlines during an investigation into health violations of the city’s pools. The pool at Graydon Hall Manor, one of the locations where he runs classes, was briefly shut down after incurring dozens of infractions. At the time, he maintained he wasn’t responsible for maintenance, while a Graydon Hall property management administrator said it had not operated the pool in more than a year.

Thimio was arrested last Thursday. He appeared in court Monday morning.