§ 151

(B)   If the landlord acts in violation of subsection (A) of this section, the tenant is entitled to the remedies provided in § 151.41 and has a defense in any retaliatory action against him or her for possession. In an action by or against the tenant, evidence of a complaint within one year before the alleged act of retaliation creates a presumption that the landlord's conduct was in retaliation. The presumption does not arise if the tenant made the complaint after notice of a proposed rent increase or diminution of services. PRESUMPTION means that the trier of fact must find the existence of the fact presumed unless and until evidence is introduced which would support a finding of its nonexistence.