He contacts the FBI to find out that they are already on Jimmy's trail though they do not have the evidence to justify an arrest. If Mamet has a cinematic trademark, it translates into control. Mamet's studied and calculated direction creates an oppressive atmosphere. The situations the characters find themselves in feel designed by some unseen force, if not appearing outright contrived. Mamet's characters talk like they are parsing their sentences as they speak.
Syllables have a constipated rhythm and purpose.
Dialog is never natural or spontaneous, but spoken with a weird deliberateness to underscore the subtext of the conversation. Added to this, nobody can seem to get to the point, creating a sense of unending frustration. In spite of the humor, there is still a grating uneasiness. Communication that leads to mutual understanding or anything resembling an honest emotional bond is an illusion that remains just within reach. The Process is Mamet's nod to Hitchcock's MacGuffin, the thing that drives the story but has no intrinsic value.