Ninth Circuit Rules on Scope of Discovery from Testifying Experts

At Cogent, we often work with experts and trial counsel to prepare graphics illustrating and explaining expert opinions. Thus, a new Ninth Circuit decision about the scope of expert discovery in federal court caught our attention. The decision in Republic of Ecuador v. Mackay, No. 12-15572 (9th Cir. Jan. 31, 2014) poses the question: where the expert has served both as a confidential advisor to counsel and as a testifying expert, may counsel withhold documents shared with the expert by asserting an opinion work product objection? The short answer is no—documents from testifying experts must be produced unless protected by Federal Rule of Civil Procedure 26(b)(4).