Mark Yancey steps down as U.S. Attorney

OKLAHOMA CITY — Mark A. Yancey has accepted a Department of Justice position at the National Advocacy Center in Columbia, South Carolina, and has announced his resignation as United States Attorney for the Western District of Oklahoma.

First Assistant U.S. Attorney  Robert J. Troester will become Acting U.S. Attorney at midnight on Saturday, Jan. 20.

Yancey joined the office in 1991, after having served as a Special Agent with the FBI.  He has prosecuted many cases and served in many roles, including as First Assistant U.S. Attorney and Criminal Chief under U.S. Attorney Sanford C. Coats from January 2010 until January 2016.

He became Acting U.S. Attorney upon Mr. Coats’s resignation and was later appointed U.S. Attorney by the Attorney General and then by the district judges of the Western District of Oklahoma.  During his tenure as U.S. Attorney, he has served on three sub-committees of the Attorney General’s Advisory Counsel—those concerning national security, civil rights, and Native American issues.

On Jan. 22, Mr. Yancey will take up the position of Assistant Director at the National Advocacy Center, where he will coordinate training for federal prosecutors in national security and other criminal cases.