RIALTO, Calif.—The Rialto Police Department has concluded its investigation into an alleged on-duty officer sex scandal and four officers disciplined in the case are back on patrol.

Two officers quit after a Spearmint Rhino strip club bartender alleged she was abused by Rialto officers after reporting she had sex with them while they were on duty. She filed a $500,000 civil rights lawsuit against the city last week.

Police Chief Mark Kling said Thursday that the four officers who were disciplined didn’t have sex on duty.

He says the department’s internal investigation has been completed, adding California law prevents him from disclosing the punishments of the four officers now back on patrol duty.

The San Bernardino County Sun says they were placed on paid administrative leave during the investigation.