MKULTRA: a hearing and a response.
Read an official hearing alongside an agency statement, with attention to scope and missing records.

Identify the official documents
The Senate hearing concerns Project MKULTRA and behavioral-modification research. The CIA statement is a separate source produced by a participant institution. U.S. Senate Select Committee on Intelligence ↗
Two sources have different roles
Compare testimony, questions, acknowledgments, and documentary references. An agency statement and a congressional hearing are not automatically independent confirmations of every detail. CIA FOIA Reading Room ↗
Mark the limits of the record
Resolve each proposition to a page or passage, and note missing documentation. Keep documented program activity distinct from unsupported later extensions of the story. U.S. Senate Select Committee on Intelligence ↗