Your landlord has an obligation to provide you with a secure living environment -- a place that has working locks, etc. Your landlord also has an obligation to not cause any interference with your quiet enjoyment of the premises by negligently failing to provide a secure living environment. If you have notified your landlord of an issue with the premises, and (s)he has failed to address those issues; and if subsequently you suffered loss because of theft that resulted from those issues, then your landlord should be liable for the loss.
Hope that helps.
Answered on Nov 01st, 2015 at 4:53 PM