Your best bet would be to hire a lawyer in Brooklyn who is experienced and specializes in landlord tenant law. It is too easy to mess up without the help of an attorney and you don't want to waste time. The sooner you hire a good attorney, the sooner you will have the tenant out. If you need assistance locating a good landlord/tenant attorney, feel free to contact me direct. Either way, good luck!
Mitchell S. Feldman
Associate Broker/ Director of Sales/ e-Pro Realtor
Fillmore Real Estate
Office: (718) 252-2000/ Cell: (917) 805-0783