Attorney General William P. Barr has tapped John H. Durham, the U.S. attorney for the District of Connecticut, to investigate the origins of the special counsel’s probe into Russian interference in the 2016 election.

Barr picked Durham in recent weeks to work on the review, which is designed to ensure the U.S. government’s “intelligence collection activities” related to the Trump campaign were “lawful and appropriate,” a person familiar with the decision said…

Durham was confirmed as a U.S. attorney in February 2018 and had previously earned a reputation as a dogged career prosecutor tapped by previous attorneys general for other high-profile roles.

In 1999, Attorney General Janet Reno appointed Durham to investigate law enforcement corruption in Boston, and more recently, Attorney General Eric H. Holder Jr. called on him to investigate the treatment of CIA detainees and the destruction of videotapes.