Muscatine

Your question is far too vague. 

If in fact someone is being legally harassed they should contact an attorney and seek civil injuncions.  If someone makes themself a target because they have a grudge they are not being harassed, they are being a fool.

Irregardless if there is a legitimate complaint and someone wants to file a complaint against a standing Sheriff they have several options.  The County Attorney, the Board of Supervisors, the State Attorney's Office in Des Moines or a private attorney. 

Based on the question you originally post it seems the "person" you elude to who "thinks" they are being harassed brings to mind an age old solution.  If you are doing something that brings unwanted attention to yourself stop doing it.

Now if you want to give better details so we actually have something to base a response on please do.  Better to not leave things out though.

The Attorney General of the State of Iowa.

Thanks to all who took the time to respond. It was and is my personal guess that it's the states attorney's office to seek help.

Forgive the question being vague. I was unsure of what to say sense it's a friend trying to obtain information and not myself. Yes it's an actual deputy sheriff and the people involved are scared retaliation will take place.  

Thanks again

Dave,

There are many agencies and offices. Depends on where it occurs and what type and to what level it occurs.