You are an FBI agent tasked with investigating a string of incidents involving a non$-$lethal, white power that has been sent via U$.$S$.$ Mail to multiple office buildings in your area. While non$-$toxic, the substance is similar in look to Anthrax, and each package contains a threatening message to the company it was sent to$.$ So far, the packages have been traced back to several local mailboxes, with no evidence of who sent them. Even though nobody has been harmed from the suspicious packages, it has left the community unnerved, and is causing delays in the delivery, opening, and reviewing of mail and packages for fear of a stepped$-$up attack. You will clearly need assistance from other government and law enforcement agencies to solve this case. Who do you bring in first? What will you be hoping to find out first to solve the crime? How might you or community officials go about spreading calm throughout the community while the case is being investigated?