This game features a very strong local ”grass roots” corruption ring:
corrupt detectives getting the cases of importance for the criminals and
doing in them what the stabby detective has been shown to be doing.
No arm of the FBI, NSA, PENTAGON, CIA or whatever shadow govt agency anyone would coin,
none of those would ever be able to unmuddle the waters, unless they actively
investigate the corrupt detectives and their criminal masterminds to connect the dots.
FBI so far is telling MC they are actively investigating the criminals and the corrupt cops.
What anyone with access to the ear of the FBI investigators can do,
they can pull on them to stop, suppress, delay, escalate or let go of one or another threads
of the investigation - consider this guy or that crime a cold trail and move on to someone
or something else.
Agent Fox had to cut the stabby detective trail out of the case in order to pursue active,
living and kicking leads she can investigate further and later propose
to a Grand Jury/judge/attorney that they would prosecute, she needs to convince them.
In the course of one ongoing investigation, anyone in law enforcement can and does chime in,
because if it were to go tits up, nobody wants to be the poster child of that fiasco.
If the operation turns out a success, everyone wants a share of the laurels.