John F X Walsh
Biography
John F. Walsh (born May 28, 1961) is an American attorney who served as the United States Attorney for the District of Colorado from 2010 to 2016. Walsh was nominated by President Barack Obama on April 14, 2010, and sworn in on August 16, 2010. When he stepped down in 2016, Walsh was the longest-serving U.S. attorney in Colorado history.
Bio from Wikipedia