Is rent received from property leased to someone who turned it into a brothel considered unlawful (haram)?

Renting out property to someone who commits forbidden acts therein can be categorized into three scenarios:

1. Scenario One: Renting out property for the purpose of using it for unlawful acts, such as an apartment for prostitution or a shop for a bar. This contract is void, and the rent money is unlawful. It must be disposed of by spending it on charitable causes, as it constitutes aiding in sin. 2. Scenario Two: Renting out property for a permissible use, and then the tenant commits some forbidden acts while utilizing the property. The contract is valid, and the rent money is lawful, because the lessor did not rent out the property for that purpose, and the sin lies in the tenant's actions. 3. Scenario Three: Renting out property for a permissible use, and then the tenant uses the property for an unlawful purpose without the lessor's knowledge. The rent money for the period before the lessor's knowledge is lawful. Upon gaining knowledge, the lessor must terminate the contract and evict the tenant immediately.

Based on this, if you rented out the property for residential purposes and were unaware of the forbidden acts, the rent money is permissible, and you acted correctly by evicting him as soon as you became aware.