Previewing what could become a long and grueling discovery process, attorneys for former Harvard law professor Alan Dershowitz said they planned to subpoena David Boies and his law firm in a defamation case by an accuser of Jeffrey Epstein.

The comments, made during a conference Monday morning in federal court, were the latest escalation in a high-profile dispute between the two legal luminaries, now on opposite sides of allegations by Virginia Giuffre, who said she was forced as a teenager to have sex with Dershowitz and other powerful men.