Does this show that the bombings were part of [their] plan, and as soon as [they] found out about the case being opened on Q, [they] prematurely ended the operation? The last thing [they] want is Q exposure, so they end the "search" for the bomber (by killing him off) so the thousands of arm-chair sleuths out there don't "discover" Q in their quest by coming across the open FBI case.
Possibly…"Coordinated to end comms here" could be a white-hat dropping an anonymous "tip" about the BOOMS to get the investigation to the qresearch boards.
More likely…"Coordinated to end comms here" could be a black-hat dropping an anonymous "tip" about the BOOMS to prevent Q from further postings for fear of FBI discovery.
"They are scared [4am]." Lo and behold…the "bomber" off's himself at around 4am…
…there are no coincidences.