Whether a single hiring decision by a final municipal policymaker can, in principle, constitute municipal policy for § 1983 purposes when the decision is facially lawful and does not direct a constitutional violation.
Holding
Yes, in principle, but only in a narrow circumstance: the plaintiff must prove that the decision was made with deliberate indifference to the known or obvious risk that the particular constitutional injury would result, and that the decision directly caused that injury.
Reasoning
Under Monell, a municipality is a “person” subject to § 1983, but it cannot be held liable merely because it employs a constitutional tortfeasor. The plaintiff must identify a policy or custom attributable to the municipality and show that the municipality's own deliberate conduct was the moving force behind the federal-rights violation.
A single decision by an official with final policymaking authority may constitute municipal policy. Cases such as Pembaur recognize liability when a final policymaker himself orders or commits the unconstitutional act, because the proof of the decision also establishes municipal fault and causation. But that principle does not eliminate the need to prove fault and causation where the policymaker's act was lawful and merely placed an employee in a position later to commit a violation.
For facially lawful municipal acts that allegedly cause employees to violate constitutional rights, deliberate indifference is a stringent standard. The municipal actor must consciously disregard a known or obvious consequence of the decision. The plaintiff also must establish a direct causal link, lest municipal liability become respondeat superior liability in another form.
A pattern of similar constitutional violations will ordinarily help establish both deliberate indifference and causation. The Court acknowledged the narrow Canton possibility that a single incident can suffice where a violation is a highly predictable result of failing to equip employees for recurring situations. But predicting constitutional misconduct from one hiring decision is generally more difficult than predicting the consequences of a specific omission from an officer-training program.