Mo. Rev. Stat. § 565.163: Venue.

Persons accused of committing the offense of interference with custody, parental kidnapping or child abduction may be prosecuted by the prosecuting attorney or circuit attorney:

(1) In the county in which the child was taken or enticed away from legal custody;

(2) In any county in which the child who was taken or enticed away from legal custody was taken or held by the defendant;

(3) The county in which lawful custody of the child taken or enticed away was granted; or

(4) The county in which the defendant is found.