1)1 roommate's mother has failed to pay rent for the past 3 months now
2)landlord did not notify me and the other roommate of this
3)the mother says she has no money to pay for the rent
4)landlord said he's taking our deposits, he already took hers for bringing a dog without asking
5)me and the other rooommate paid our rent, no problems there
6)me and other roommate are now out $500
7)I dont have my copy of the lease, we each signed different ones, I asked him to send it to me a long time ago but he never didWaht are my options as far as getting my $500 back? Is the landlord allowed to do this? Could we sue?