The province's Serious Incident Response Team looked into allegations made against the male member of the Cape Breton Regional Police.
It says the officer was accused of assaulting two women at a fire hall and outside a pizza shop just after midnight in Dominion on Aug. 1.
The team says it received statements from 19 civilian and eight police witnesses as part of its investigation.
Const. Jefferey Hennessey is facing a charge of assault against one woman and two charges of assault against another.
He is due in Sydney provincial court on Sept. 24.
The team investigates all serious incidents involving police in Nova Scotia.