Bank Hostage Negotiation

At 3:59 p.m. on the afternoon of Halloween, October 31st, the police received an alarm signal that the Catawba National Bank on Third and Main was being robbed. Upon arriving at the scene, they found the bank doors locked and an undetermined number of bank robbers holding an undetermined number of hostages inside. The closed circuit cameras had been disabled. No communication with the robbers had been initiated. Your job as a group is to resolve this hostage crisis satisfactorily within the limited time you have.