The House Judiciary Committee will hear public testimony from former special counsel John Durham about his probe into the origins of the Trump-Russia investigation on June 21, two sources familiar with the committee’s plans told NBC news.

Durham was charged by former U.S. Attorney General William Barr with leading a probe into the FBI and Justice Department’s handling of the investigation into Russian interference in the 2016 election —an investigation Barr had been highly critical of.

Durham completed his four-year investigation and filed a lengthy final report earlier this month that concluded the FBI inappropriately launched a full investigation into the allegations, but stopped short of providing any new evidence that anyone in the government had broken the law.