Adopted 1945. Its declaration of rights sits in Article I (Bill of Rights). This court has the final word on what the Missouri constitution means.
Lockstep with the federal Constitution
How a state reads its own rights provisions relative to the federal floor, lockstep vs departure.
State-court structure and selection methods are from official and reference sources; the justice roster is point-in-time. Civibrief carries each state's highest court (lower state courts are out of scope for now).