Law of the Case Doctrine
Once a court decides an issue at one stage of a case, that ruling governs later stages of the same litigation, including on remand or appeal.
Law of the case is a doctrine of litigation discipline within a single lawsuit: when a court — trial or appellate — rules on a legal issue, that ruling ordinarily controls every later stage of the same case, so the issue is not relitigated every time it resurfaces. It exists to promote consistency, discourage forum-shopping between stages of one case, and bring finality to issues as litigation progresses, without requiring the case itself to be over.
It is a discretionary rule of practice rather than a jurisdictional bar, which is what separates it from preclusion doctrines that operate between separate cases. A court retains the power to revisit its own earlier ruling; the doctrine simply channels when it should decline to.
Scope: same case, same issue
The doctrine applies only within the same litigation — a ruling by a trial court or an appellate panel governs subsequent proceedings in that same case, including a second trial after remand or a later motion presenting the same legal question. It does not bind a different court in a different lawsuit, and it does not resolve factual disputes; it applies to legal rulings and legal issues actually decided.
The recognized exceptions
Courts recognize several circumstances where departing from an earlier ruling is appropriate: the earlier decision was clearly erroneous and would work a manifest injustice if left standing; substantially different evidence has since been presented; or an intervening change in controlling law has occurred. Because these exceptions exist, law of the case functions as a strong presumption rather than an absolute rule.
How it differs from res judicata and collateral estoppel
Res judicata (claim preclusion) and collateral estoppel (issue preclusion) operate between separate lawsuits and typically require a final judgment. Law of the case operates entirely inside one ongoing lawsuit and does not require finality — a trial court ruling on a motion can become law of the case for the remainder of that same litigation long before any judgment is entered.
Modeling it in Juricratic
Juricratic tracks law-of-the-case exposure as a lock on a prior decision node within the matter's own procedural timeline: once a ruling is entered, downstream branches inherit it as a fixed constraint unless the matter's dial set includes one of the three recognized exceptions — clear error, new evidence, or intervening law change. This lets a rehearsed line show the actual cost of trying to relitigate a settled issue versus the cost of building the case around it.
- Can a court ever change its own earlier ruling under law of the case?
- Yes. The doctrine is discretionary, not jurisdictional, and courts can depart from it when the earlier ruling was clearly erroneous and would cause manifest injustice, when the evidentiary record has substantially changed, or when controlling law has changed in the meantime.
- Does law of the case bind a different judge assigned to the same case later?
- Generally yes — the doctrine attaches to the case and its prior rulings, not to the individual judge who issued them, so a successor judge on the same case is expected to follow the earlier ruling absent one of the recognized exceptions.
- How is law of the case different from stare decisis?
- Stare decisis is about following precedent from other, prior cases to promote consistency across the legal system generally. Law of the case is narrower: it binds a court only to its own, or a higher court's, earlier ruling within the very same lawsuit.
This page is an educational explainer, not legal advice, and creates no attorney–client relationship. Juricratic is a simulation engine: every probability-like figure is a dial you set, not a calibrated prediction. Verify every rule, deadline, and figure against the authorities and orders that govern your matter.
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