A court order used in complex injury cases to require each plaintiff to produce basic evidence - often medical records, diagnosis information, exposure details, and expert support - before the case can move forward.

These orders usually appear in mass tort or other large, multi-plaintiff lawsuits where a judge needs a practical way to sort out which claims have enough proof to continue. For example, after a large chemical release, drug injury event, or chain-reaction highway crash, a judge may require each person to show when and how the exposure or incident happened, what injuries were diagnosed, and whether a doctor links those injuries to the event. It is an early screening tool, not a final decision on the whole case.

For injured people, a Lone Pine order can be a major turning point. If someone has solid records and a clear medical connection, the order may strengthen the claim and push the case toward discovery, settlement, or trial. If records are incomplete, deadlines are missed, or the medical link is weak, the court may narrow or dismiss the claim.

In Missouri, there is no specific statewide Lone Pine statute, but judges may use case-management powers to organize complicated litigation. That can matter after large disasters or pileups on I-44 or I-70, where many people are hurt but each person still has to prove causation and damages individually.