Not every conspiracy theory is fiction. Some are simply history that has not yet been declassified. The distance between fringe allegation and documented fact has, on multiple occasions, been bridged not by speculation but by evidence — released through freedom of information requests, congressional investigations, whistleblower disclosures, and the slow opening of national archives. This book examines the documented cases in which claims once dismissed as paranoid or marginal were subsequently confirmed by official records. From COINTELPRO's systematic surveillance of civil rights leaders to MKUltra's covert human experimentation, from the Gulf of Tonkin fabrication to the coordinated suppression of pharmaceutical safety data, each case is reconstructed from the primary sources that ultimately proved the allegation true. The analysis does not validate conspiracy thinking as a method — it does the opposite. By examining precisely what made these cases provable, the book establishes the evidentiary standards that separate documented institutional deception from unfounded speculation. It asks what these verified cases reveal about the conditions under which democratic governments deceive their own citizens, how oversight mechanisms failed, and what structural reforms followed — or failed to follow — each exposure. For readers who want to understand where institutional secrecy ends and documented deception begins, this book offers a historically rigorous, source-grounded account of the cases where the record ultimately spoke for itself.