Believe it or not, the Justice Department sometimes investigates until they get the answer they want:
Justice Dept. Shakes Up Inquiry Into Eric Garner Chokehold Case
By Matt Apuzzo, Adam Goldman, and William K. Rashbaum Oct 24, 2016
The Justice Department has replaced the New York team of agents and lawyers investigating the death of Eric Garner, officials said, a highly unusual shake-up that could jump-start the long-stalled case and put the government back on track to seek criminal charges.
Federal authorities have been investigating whether officers violated Mr. Garner’s civil rights in his fatal encounter with the police. But thecase had been slowed by a dispute because federal prosecutors andFederal Bureau of Investigation officials in New York opposed bringing charges, while prosecutors with the Civil Rights Division at the Justice Department in Washington argued there was clear evidence to do so.
In recent weeks, the F.B.I. agents who have been investigating the case were replaced with agents from outside New York, according to five federal officials in New York and Washington. Federal prosecutors in Brooklyn are no longer assigned to the case. It is not clear whether civil rights prosecutors from Washington will work alone in presenting evidence to a grand jury in Brooklyn and in trying the case if charges are eventually brought.
Naturally only right-wing cranks will think that this sort of energy and commitment to "justice" was sorely lacking in the Hillary email server "investigation".
Now, To Be Fair, it may be the case that the NY-based FBI investigators and Justice Department prosecutors are too cozy with their counterparts in NYC law enforcement. Yet it seems that the Civil Rights Division of the Justice department knew a long time ago what result they expected the investigation to produce.
Of course, there is no reason to think anyone in Justice pre-judged the Hillary case or had a rooting interest in one outcome or another. Groan.