There is not a single reason to trust the FBI or DOJ ever again

Since they have proven themselves to be absolutely corrupt.

In this case, the FBI and the Justice Department have succeeded in the most significant coverup in American political history. The abuses of power and crimes they have succeeded in covering up are not only against the law: they are crimes against our system of law and government. They were perpetrated by employees of the government, under color of law, with the intention of affecting the outcome of an election. 

For almost two years an investigation into the abuses of power — and probable crimes — committed by the FBI and Justice Department during the election has been conducted by House Permanent Select Committee on Intelligence chairman Devin Nunes (R-Cal).  Rep. Bob Goodlatte — chairman of the Judiciary Committee — and Trey Gowdy — chairman of the Oversight and government reform committee — tried to investigate other aspects of the FBI and DoJ actions. 

These investigations have been stonewalled by the refusal of the FBI and Justice Department to produce the documents and provide access to witnesses that would, in all likelihood, prove that the major abuses of power and crimes had been committed.

I don't think this is a case of "Absolute power corrupts absolutely", I think this is a case where people who are already corrupt are drawn to places and jobs that give them the power to continue their corruption.  Certain James Comey, noted Clinton lackey and all around bitch-boy, was corrupt long before he was given the job at the FBI.  In fact, his corruption and law-breaking was certainly one of the reasons he got the job in the first place.

The two important products of those investigations were the 18 January 2017 memo declassified by President Trump and released by Nunes and the newly released 28 December 2018 letter from Goodlatte and Gowdy addressed to Senate Majority Leader Mitch McConnell, Acting Attorney General Matthew Whitaker, and DoJ Inspector General Michael Horowitz. 

If this is the first you’ve heard of the 28 December letter, that’s because it’s been studiously ignored by the media.

Read the whole thing.  Our legal system at the Federal level only exists to keep their friends and allies in power.  I cannot think of anything more detrimental to this country than to have different laws applied to people based on their political connections.  But that's what we have in this country right now.  Hell, it's a big part of the reason Trump got elected.  But I don't think he can fix it.  To go with what NeanderPundit has been saying for a while:  I don't think we're voting our way out of this.