Hans Eduard Unruh, 65, of St.Catharines, was arrested yesterday for sexual assault.
In July 2016 the Niagara Regional Police became involved in the investigation for a St. Catharines man who was accused of sexually assaulting a 17 year old female. The assault took place at Holy Cross Secondary School, where Unruh was a teacher from January 2011-January 2012.
Unruh is being charged with sexual assault and sexual explotation.
He was set to attend a bail hearing today at the Robert S.K. Welch courthouse in St.Catharines.
Detectives are asking any other victims to come forward.