David Shimkin, member of Cozen O'Connor's Commercial Litigation Department, authored, "Experts, Hearsay, and the ‘Sanchez’ Case" for California Lawyer. The California Supreme Court has clarified when an expert can rely on hearsay—and when the expert can tell a jury about it. As the California Supreme Court recognized in People v. Sanchez, 63 Cal.4th 665 (2016), the common law recognized that experts frequently acquired their knowledge from hearsay, and that, to reject a professional physical or mathematician because the fact or some facts to which he testifies are known to him only upon the authority of others “would be to ignore the accepted methods of professional work and to insist on … impossible standards.”
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