9th Cir.

Brown v. Nguyen, et al.

June 26, 2026 ·3:23-cv-00593-WHO ·Unpublished · By Aisha Johnson

The United States Court of Appeals for the Ninth Circuit affirmed a district court ruling in a prisoner civil rights case. The appellate panel upheld summary judgment on an Eighth Amendment claim and dismissed several other claims for failure to state a plausible cause of action.

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Background

Gregory L. Brown, a California state prisoner, filed a pro se action under 42 United States Code Section one thousand nine hundred eighty-three alleging various constitutional violations. The district court granted summary judgment against one defendant and dismissed claims against several others before Brown appealed.

The court’s reasoning

The panel reviewed the case de novo. Regarding the Eighth Amendment claim, the court found that a difference of opinion between a plaintiff and a doctor is insufficient to show deliberate indifference. The plaintiff must show that the chosen course of treatment was medically unacceptable under the circumstances. For the other defendants, the court held that pro se pleadings must still present factual allegations sufficient to state a plausible claim. Supervisors cannot be held vicariously liable for the actions of subordinates. Claims against certain defendants were dismissed because they did not arise out of the same transaction or occurrence as the rest of the action.

a plaintiff must show that the chosen course of treatment was medically unacceptable under the circumstances

Toguchi v. Chung, 391 F.3d 1051, 1057-60 (9th Cir. 2004)

What it means going forward

The decision reinforces the high bar for proving deliberate indifference in prisoner medical care cases and clarifies that supervisors are not liable for subordinates’ actions without direct involvement.