The accused was tried for sexual assault against his 18-year-old niece.
The Crown alleged the accused touched the complainant's breast and digitally penetrated her vagina without consent while she was drowsy from medication.
The court admitted the accused's out-of-court statements to a friend and expert psychiatric evidence called by the defence.
The court found that the accused touched the complainant's breast before asking if she was uncomfortable, and that any subsequent consent was vitiated by his abuse of a position of trust.
The court also accepted the complainant's evidence that the accused digitally penetrated her while she was asleep.
The accused was found guilty of sexual assault.