Rental Safety

From what I understand, the apartment where this took place is located in a house that has been subdivided into several apartments. However, there is no key for the tenants to lock the main door so anyone who wants to can wander in at all hours of the day or night. After the robbery, the tenants asked the landlord to install a keyed lock on the main door but the landlord refused. Apparently, the only option now is for the tenants to file a formal request for inspection with the city. You'd think your landlord would want to make his tenants feel safe in his properties.