A law professor will testify before the House Judiciary Committee Wednesday during the House of Representatives’ impeachment inquiry into President Donald Trump.

Jonathan Turley, a public interest law professor, will appear alongside three law professors from Harvard and Stanford universities and the University of North Carolina, according to a release Monday. The professors’ testimonies will be the committee’s first impeachment hearing into Trump following weeks of testimonies to the House Intelligence Committee.

Turley did not return a request for comment.

The professor has testified in front of Congress more than a dozen times. He appeared before the Judiciary Committee in November 1998 to advise members of Congress during impeachment hearings for former President Bill Clinton.

Turley has criticized House Democrats’ handling of the current impeachment inquiry, saying the investigation lacks direct evidence of a quid pro quo between Trump and Ukrainian President Volodymyr Zelensky. House members have sought out evidence that Trump negotiated with Ukrainian government leaders to investigate political rival and presidential candidate Joe Biden.

“Like frenzied shoppers, Democrats are rushing to obtain impeachment before Christmas, despite pursuing an impeachment that seems designed to fail with an incomplete and conflicted record,” he wrote in a column for The Hill earlier this month.