John H. Durham, who served as a United States attorney for the District of Connecticut for more than three years and as a federal prosecutor in Connecticut for more than 38 years, has announced his resignation from the U.S. Attorney’s Office.

His resignation is effective at midnight on Feb. 28.

“My career has been as fulfilling as I could ever have imagined when I graduated from law school way back in 1975,” said U.S. Attorney Durham in prepared remarks. “Much of that fulfillment has come from all the people with whom I’ve been blessed to share this workplace, and in our partner law enforcement agencies. My love and respect for this Office and the vitally important work done here have never diminished. It has been a tremendous honor to serve as U.S. Attorney, and as a career prosecutor before that, and I will sorely miss it.”

First Assistant U.S. Attorney Leonard C Boyle will serve as Acting U.S. Attorney upon Mr. Durham’s departure.

Durham was previously appointed by former Attorney General William Barr as a special counsel to investigate the origins of the Trump-Russia probe.