Mo. Ann. Stat. §568.052 (2004)
Leaving a child unattended in a motor vehicle who causes an accident -- first and second degree, penalties
(1) "Collision", the act of a motor vehicle coming into contact with an object or a person;
(2) "Injury", physical harm to the body of a person;
(3) " Motor vehicle", any automobile, truck, truck-tractor, or any motor bus or motor-propelled vehicle not exclusively operated or driven on fixed rails or tracks;
(4) " Unattended", not accompanied by an individual fourteen years of age or older.