Corporate executives bought political influence with illegal contributions, but the investigators kept the evidence in a separate file to shield the politicians who took the money.
Corporate funds were funneled to Nixon's re-election effort through a reimbursement scheme that the Watergate Special Prosecution Force kept in a separate, complex file.
Private diaries and sworn lies were distilled into evidentiary abstracts by Watergate investigators, a process that filtered the truth before it reached a courtroom.
The Office of the Deputy Special Prosecutor shielded the closed-door testimony of seven congressional committees, hiding the intersection of corporate bribes and political espionage.