A Burlington OPP officer is facing a charge of sexual assault after an investigation by the province's Special Investigations Unit (SIU).

The SIU, an arm’s-length agency that investigates reports involving police where there has been death, serious injury or allegations of sexual assault to determine whether criminal charges are warranted, was contacted in August 2019 "regarding a complaint of a sexual nature against the officer," the SIU said in a release.

The alleged incident occurred on August 9, 2019, in Aurora and involved a woman.

Const. Robert Horton, an officer with the Niagara satellite detachment of the Burlington detachment, has been charged with sexual assault.