Missouri Revised Statutes Title XXIX. Ownership and Conveyance of Property § 441.740. Immediate eviction ordered, when--immediate removal ordered, when

(1) An emergency situation where dispossession of the tenant by other, less expeditious legal means would, because of the passage of time, imminently cause with a reasonable certainty either of the following:

(2) Drug-related criminal activity has occurred on or within the property leased to the tenant;

(3) The property leased to the tenant was used in any way to further, promote, aid or assist in drug-related criminal activity;

(4) The tenant, a member of the tenant's household or a guest has engaged in drug-related criminal activity either within, on or in the immediate vicinity of the leased property;

(5) The tenant has given permission to or invited a person to enter onto or remain on any portion of the leased property, and the tenant did so knowing that the person had been removed or barred from the leased property pursuant to the provisions of sections 441.710 to 441.880; or

(6) The tenant has failed to promptly notify the plaintiff that a person whom the plaintiff previously had removed from the property leased by the tenant, with the knowledge of the tenant, has returned to, entered onto or remained on the property leased by the tenant.