There is no general legal obligation whatsoever to disclose this. If, however, *prior*  to renting the home, you specifically ask the landlord  whether  there were any deaths/murders/suicides and make it plain to the landlord that this is an important consideration to you in determining where  to live, then the landlord may not lie about this--if  he  does, he has likely committed fraud, which could give you grounds to escape the lease without penalty and/or seek monetary compensation. However, if the person you speak with did not know of any such, there would be no claim or liability if you later discover he is wrong; fraud is lying, not being innocently mistaken.