The self proclaimed “America’s toughest sheriff” is in some trouble:

Maricopa County Sheriff Joe Arpaio is now the target of a federal grand jury probe, according to the Maricopa county manager.

Manager David Smith tells 12 News he has been called as a witness in the investigation, as well as Deputy County Manager Sandi Wilson.

Sources say the investigation is tied to allegations of abuse of power relating to targeting political opponents and enemies for harassment and investigation. Smith says that includes threatening investigations against opponents when there is no probable cause and intimidating county employees at their homes.