(FORTUNE Magazine) – Look out, all you corporate Jesse Jameses. It is high noon in the executive suite. Three hombres out of the law offices of Milbank Tweed Hadley & McCloy are gunning for varmints in business. There's the Old Hand, William E. Jackson, 68, a staff attorney at the Nuremberg trials and a Milbank partner for 34 years. There's the Boston Brahmin, Elliot L. Richardson, 67, former U.S. Attorney General and a Milbank partner since 1980. And there's the Young Hot Shot, Thomas P. Puccio, 43, the streetwise, Bronx-educated Abscam prosecutor who joined Milbank last year. The three will help companies track down wrongdoing from insider trading to money-laundering schemes. While lawyers' investigations of corporate malfeasance are not new, only Milbank has dedicated star attorneys specifically to the task. Puccio says, ''No other firm has the experience or the clout.'' The partners maintain that their different backgrounds make them an unusually strong team. Richardson is an expert in government regulatory bodies, Jackson a specialist in corporate litigation, and Puccio a criminal lawyer. They stand ready to combat what Richardson calls ''a certain tendency to condone greedy behavior.'' What if that behavior points to the chief executive who hired them? Says Jackson: ''The law firm would do its job.'' You can almost hear Tex Ritter singing.