There are things that can be done including the potential for a lawsuit, but rare is the attorney that will expend his own time and resources for a lawsuit where there are no articulable damages. Even a federal suit with a nominal award can be a longshot and not too many attorneys are such idealists ... they have to pay rent and support themselves and their families. But, yeah, there are options if you think you were subject to a wrongful search: personnel complaint to the agency or a board or agency monitoring the agency, go to the media, hire an attorney, etc.