Debevoise &amp; Plimpton LLP (often shortened to Debevoise) is a global law firm based in New York City. Founded in 1931 by Harvard Law School alumnus Eli Whitney Debevoise and Oxford-trained William Stevenson, Debevoise specializes in strategic and private equity, M&amp;A, insurance and financial services transactions, private funds, complex litigation, investigations, and international arbitration. As of 2021, the law firm is assisting the Democratic Party in the Second impeachment trial of Donald Trump.