Employment Litigation · Primary-source case analysis

Staub: A Biased Supervisor Can Cause Liability Through an Independent Decisionmaker

By Aneeta Mishra and Timothy Chan

Published September 6, 2026

Staub v. Proctor Hospital addressed whether a personnel official’s independent involvement necessarily breaks the chain between supervisor hostility and an employee’s discharge.

Supervisors documented alleged misconduct

Staub claimed supervisors hostile to his military obligations placed a warning in his file and later accused him of violating it. A vice president relied in part on that record when terminating him.

Intent and proximate cause supplied the rule

Liability could follow when a supervisor acted with discriminatory animus, intended to cause the adverse action, and the act proximately caused the decision.

Independent review was not an automatic defense

A separate decisionmaker’s investigation could defeat causation if it resulted in an action for reasons unrelated to the biased report, but merely exercising judgment did not necessarily erase the supervisor’s influence.

The judgment for the employee was reinstated for further review

The Court rejected the categorical rule used below and remanded for consideration of remaining issues under the proper standard.

Key takeaways

• Trace every factual input reaching the final decisionmaker.
• Identify who intended to trigger discipline or discharge.
• Test whether an independent investigation actually resolved disputed facts.
• Preserve the chronology, warnings, recommendations, and stated reasons.