Thirteen Boies Schiller Flexner partners have left that firm to join King & Spalding’s trial and investigations group in California.

Their departure is the latest in a slew of recent defections from the New York-based practice founded by marquee litigator David Boies. It’s a coup for King & Spalding, which has added more than a dozen new partners in offices across the U.S. this year, firm Chairman Robert Hays said in a statement announcing the new hires on Thursday.