You Are a Philadelphia Police Officer Assigned Toa Special Anti-Terrorism

You are a Philadelphia police officer assigned toa special anti-terrorism unit. The goal of this unit is toprevent and deter all acts of terrorism in the city. Your responsibilities include monitoring certain "hang out spots" where known suspected terrorist affiliates congregate todiscuss and share information regarding radicalizing American youth in the hopes of having them join ISIS. Being that you are of middle-eastern descent, you consistently goundercover tofrequent these known hot-spots totry togather information. one evening you gointoa Syrian restaurant that has been labeled as a "hot spot" toobserve twosuspected associate members of ISIS talking about buying a rocket propelled grenade launcher touse toblow up a city bus. Although you can tell that the men have been drinking, you believe that they are serious. As one individual goes toleave the restaurant, you decide tofollow him tohis car. Based on what you overheard, you believe he is going toget money out of his car tocome back topurchase the grenade launcher. At this point, what doyou do? Doyou have probable cause toarrest the suspect? Please explain.