Who is James Comey's friend and leaker Daniel Richman?

The Columbia Law School professor leaked Comey's memos to the New York Times.

Speaking before the Senate Intelligence Committee on June 8, Comey said he wanted to get a record of his meetings with President Donald Trump “out into the public square” so he decided to ask a friend to share the content of his memo with a reporter.

Richman, an adviser to Comey, confirmed to ABC News that he was the friend Comey was referring to during his testimony.

Before joining Columbia Law School, Richman served as chief appellate attorney in the U.S. Attorney’s Office for the Southern District of New York and was a professor at Fordham Law School.

At Columbia, he specializes in federal criminal law, criminal procedure and evidence. He’s written more than 30 law review articles, and has offered expert testimony at congressional hearings.

He received his undergraduate degree at Harvard University in 1980 and attended law school at Yale University, where he graduated in 1984.

Richman told ABC News in an email that he has given to the FBI all “relevant materials” related to Comey’s notes.

"Special counsel has been in contact with the committee to discuss access," he wrote. "In the meantime, I am turning the relevant materials over to the FBI."