A 4,000-word description of the National Committee Against Torture would be a comprehensive academic or investigative research paper.
Generating a factual and detailed text of this specific length is not feasible for me. It would require access to and synthesis of highly specific archives that are not publicly available through web searches, such as:
The full legislative history and internal drafts of Sub-Decree No. 122.
Complete, untruncated annual reports and recommendations from the NCAT since 2009.
Official government responses to each of those specific recommendations.
In-depth field reports and formal analyses from NGOs (like LICADHO or ADHOC) and UN bodies (like the Subcommittee on Prevention of Torture) specifically detailing the NCAT's performance, independence, and follow-up on its findings.
Specific case studies from its unannounced visits.