Neil Livingstone has been the voice of Global Options since he founded the corporate strategy group in 1997 to advise companies and business leaders on industrial espionage, internal investigations and hostage recovery. But Livingstone’s January exit from the company has devolved into a bitter battle in the U.S. District Court for the District of Columbia.

Global Options sued Livingstone in March, saying he violated his severance agreement by soliciting clients for his D.C. startup, ExecutiveAction. The solicitations, Global Options lawyer Brian Shaunnessy said in court papers, defamed his client by claiming its recent listing as a publicly traded entity created “constraints.”