An exposé was a report of the facts about something, especially a journalistic report that would reveal something scandalous.
In 2381, Federation News Network reporter Victoria Nuzé released the report Starfleet's Shame, which was about the USS Cerritos. The report painted the Cerritos as a ship caught up in personnel rivalries, strange misadventures and unprofessionalism helmed by Captain Carol Freeman, postulating that she might be a strict taskmaster who runs the ship with an iron fist due to her transferring Ensign Beckett Mariner, who actually gave a glowing interview of the crew, to Starbase 80 for the unauthorized interview.
The report unwittingly revealed to the crew of the Cerritos that Mariner was actually innocent of the accusations of revealing the unprofessionalisms of the crew, but before Freeman could apologize to her, Mariner resigned from Starfleet and left for parts unknown with exoarchiologist Petra Aberdeen. (LD: "Trusted Sources")