The landlord's problem involves the relationship between lawyer's professional ethics and social obligations.
The new lawyer law clearly stipulates that the lawyer's duty is to safeguard the legitimate rights and interests of the parties first, and then to safeguard social justice. In other words, when there is a conflict between the two, the interests of the parties should be given priority.
Then it is not difficult to solve the problem of the landlord. Lawyers can certainly defend guilty people, which is the result of lawyers' professional ethics.