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§ 577.300 RSMo – Leaving a Child Unattended in a Vehicle in Missouri

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Posted by Christopher Combs on July 22, 2025

577.300. Leaving a child unattended in a motor vehicle — first and second degree — penalties

Leaving a young child alone in a car can lead to serious charges if someone gets hurt

If a child under 11 is left alone in a car and causes a crash that injures or kills someone, the adult responsible can face a misdemeanor or felony, depending on the outcome.

1. Definitions used in this law:

  • (1) “Collision”: When a vehicle hits a person or object.
  • (2) “Injures”: Physically hurts someone.
  • (3) “Motor vehicle”: Any car, truck, bus, or motor-powered vehicle (not on tracks).
  • (4) “Unattended”: No one age 14 or older is with the child.

2. A person commits first-degree leaving a child unattended if they knowingly leave a child under age 11 alone in a car, and the child causes a crash or hits a pedestrian that results in someone’s death.

3. First-degree offense is a class C felony.

4. A person commits second-degree leaving a child unattended if they knowingly leave a child under age 11 alone in a car, and the child causes a crash or hits a pedestrian that results in injury (but not death).

5. Second-degree offense is a class A misdemeanor.

View the full statute here

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