Marc Mukasey, the high-profile co-chair of Greenberg Traurig’s white-collar defense and special investigations practice, has left to start his own trial boutique with other attorneys.

Mukasey, who spoke with ALM on Tuesday, said the boutique expects to add additional partners in the near future from other law firms, including Greenberg partner Robert Frenchman, who worked with Mukasey for the past 10 years.