Ottawa Police have laid more charges against a former teacher at the Ottawa-Carleton District School Board at the centre of a historical sexual assault investigation.
72-year-old Robert Clarke of Morrisburg was first arrested in June, accused of inappropriately touching a male student in the 1980s.
Additional charges were laid in July, and now two more counts of gross indecency have been added, bringing the total to four along with two counts of sexual assault and one count of sexual exploitation.
Police say the allegations date back to incidents between 1973 and 1992 when Clarke was in the course of his duties.
Investigators are still concerned there may be more possible victims.