A 45-year-old Plattsville man is facing sexual assault charges involving a girl one-third of his age. OPP say they've laid several charges against Peter Heinisch, from Plattsville for sexual assault and Sexual Interference with a person under 16 years of age. The victim is reported to be a 15-year-old girl. The alleged incident happened on February 12th. Police are also appealing for anyone with information, or knowledge of other possible incidents to contact Detective Constable Beth Brown at 519-688-6540.