WATERLOO, Neb. -- A Waterloo volunteer firefighter has been charged with sexual assault after authorities say he drugged a woman and attacked her while she was incapacitated. 

The Douglas County Attorney has charged 27-year-old Brandon Hanusek with first-degree sexual assault of a mentally or physically incompetent person. 

Waterloo Volunteer Fire Department Chief Travis Harlow said he placed Hanusek on administrative leave after he was charged in May. Hanusek posted a $2,500 bond after he was arrested in early June and he remains free while the case is pending.