John Kellner

John Kellner most recently served as the elected District Attorney for Arapahoe, Douglas, Elbert, and Lincoln counties, where he was responsible for seeking justice for over 1.1 million Coloradans. He tried several of Colorado's toughest and most prominent cold cases and was recognized as the top prosecutor in the state and by Mothers Against Drunk Drivers for holding reckless drivers accountable. John is a U.S. Marine Corps and Afghanistan War veteran who served on active duty as a trial counsel, operational law attorney, and Special Assistant United States Attorney.

He continues to serve as a Lieutenant Colonel in the Marine Corps Reserves. Alongside Dan Caplis and Babar Waheed, he secured a $205 million jury verdict in the amusement park wrongful death case. John is a graduate of the University of Colorado-Boulder School of Law.