 Black and the FBI investigate the crime scene; Black not only realises the bomber's proficiency with explosives, but is able to work out that he viewed the bombing from the parking garage.In a bin in the garage, they find a tissue covered in Dees' semen.Black informs the FBI that the bomber is smart enough to be able to tap into their phonecalls, and volunteers to bait him into eavesdropping on his mobile phone.