Nearly 50 partners have left Dewey & LeBoeuf since January, taking their practices to competitors including Sutherland Asbill & Brennan, Willkie Farr & Gallagher, Hogan Lovells, and Sidley Austin. On Friday, The Wall Street Journal broke the news that Dewey structured finance head Stephen Rooney is departing for Mayer Brown, the second partner to leave for that firm this week.

Many of the defectors have remained mum on what prompted them to leave Dewey. But one-John Altorelli, a corporate and finance heavyweight who left Dewey’s New York office for DLA Piper earlier this week-spoke with The Am Law Daily at length Thursday about the circumstances surrounding his departure.