John S. Leonardo | |
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| United States Attorney for the District of Arizona | |
| In office 2012 – January 20, 2017 | |
| Appointed by | Barack Obama |
| Preceded by | Dennis K. Burke |
| Succeeded by | Elizabeth A. Strange (acting) Michael G. Bailey |
| Personal details | |
| Education | University of Notre Dame George Washington University Law School |
John S. Leonardo is a former United States Attorney for the District of Arizona.