Mo. Rev. Stat. § 441.233: Landlord's unlawful removal or exclusion of tenant, liability — interruption of services, landlord's liability.

1. Except as provided in section 441.065, a landlord or its agent who removes or excludes a tenant or the tenant's personal property from the premises without judicial process and court order, or causes such removal or exclusion, or causes the removal of the doors or locks to such premises, shall be deemed guilty of forcible entry and detainer as described in chapter 534.

2. Any landlord or its agent who willfully diminishes services to a tenant by interrupting or causing the interruption of essential services, including but not limited to electric, gas, water, or sewer service, to the tenant or to the premises shall be deemed guilty of forcible entry and detainer as described in chapter 534; provided however, this section shall not be applicable if a landlord or its agent takes such action for health or safety reasons.