How much evidence is enough to establish the crime-fraud exception to attorney-client privilege? With its recent opinion in In re Grand Jury, Nos. 12-1697 & 12-2878 (Dec. 11, 2012), the U.S. Court of Appeals for the Third Circuit addressed the issue in the context of subpoenas issued to the former in-house counsel of a company subject to a grand jury investigation.

According to the precedential opinion, a party seeking to challenge attorney-client privilege by means of the crime-fraud exception must produce evidence demonstrating a “reasonable basis to suspect” that the elements of the crime-fraud exception have occurred. This newly announced standard clarifies Third Circuit precedent and at the same time serves to highlight the split among the federal courts of appeals over how to construe the “prima facie evidence” standard for the crime-fraud exception first articulated by the U.S. Supreme Court in Clark v. United States, 289 U.S. 1 (1933).