Proofpoint, Inc. v. Vade Secure, Incorporated
- Maxine Chesney
- 3:19-cv-04238
- U.S. District Court · Northern District of California
- 3
In Proofpoint v. Vade Secure, Judge Chesney granted defendants’ motion, excluding an expert’s opinion that defendants misappropriated trade secrets.
The ruling affects Proofpoint, Inc. and the other plaintiffs by limiting the testimony of their expert, Dr. Seth Nielson, and affects the defendants by resolving their motion to exclude that specific opinion.
What happened
Proofpoint, Inc. v. Vade Secure, Incorporated concerns plaintiffs’ claim that defendants violated the federal Trade Secrets Act. Plaintiffs’ cybersecurity expert, Dr. Seth Nielson, offered an opinion that defendants misappropriated plaintiffs’ trade secrets.
Defendants asked the court to exclude that specific opinion. The court ruled that whether trade-secret misappropriation occurred is a legal question for the court or jury, not an opinion an expert may give as a legal conclusion.
Judge Chesney granted defendants’ motion and barred Dr. Nielson from offering the opinion that any defendant misappropriated plaintiffs’ trade secrets. The order did not address the other opinions identified in the motion papers.
The detailed version
- Proofpoint, Inc. v. Vade Secure, Incorporated · No. 3:19-cv-04238
- Maxine Chesney
- June 10, 2021
Background
Plaintiffs assert a claim under the federal Defend Trade Secrets Act, alleging that defendants misappropriated plaintiffs’ trade secrets. Plaintiffs retained Seth James Nielson, Ph.D., as a cybersecurity expert. His expert report included an opinion that defendants misappropriated plaintiffs’ trade secrets.
Defendants filed a motion under the standards governing expert testimony, commonly called a Daubert motion, asking the court to exclude that opinion. Defendants did not seek to exclude Dr. Nielson’s other opinions, including opinions offered to support his conclusion about misappropriation.
Court’s Analysis
The court explained that expert testimony may address an ultimate factual issue, but an expert may not give an opinion stating a legal conclusion. The court determined that whether defendants misappropriated plaintiffs’ trade secrets is the ultimate legal issue presented by the trade-secrets claim. The court also noted that “misappropriation” has a specific meaning under the Trade Secrets Act.
Because Dr. Nielson’s opinion directly stated the legal conclusion that defendants misappropriated plaintiffs’ trade secrets, the court held that he could not offer that opinion. The ruling concerned the specified misappropriation conclusion and did not rule on the other opinions identified in the motion papers.
Disposition
Judge Maxine M. Chesney granted defendants’ Daubert motion. The court precluded Dr. Nielson from opining that any defendant misappropriated plaintiffs’ trade secrets.
Read the full 3-page opinion on CourtListener, the free public archive maintained by the Free Law Project.