Under Section 172 of the CrPC, the Case Diary (CD) is a confidential document, primarily accessible only to the investigating police officers and the trial court to assist with inquiries. Accused persons or their advocates are generally not entitled to access or inspect the case diary during investigation or trial. [1, 2, 3, 4, 5] 

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Key details regarding access to the Case Diary:

• Investigating Officer (IO): Maintains and uses the diary to record daily investigation progress, including times, places visited, and statements.
• Trial Court: The court may summon and use the diary to assist in an inquiry or trial, but not as evidence.
• Limited Access for Accused: The accused may only access specific entries if the police officer uses them to refresh their memory while testifying in court, or if the court uses them to contradict the officer.
• RTI Restrictions: Case diaries are considered privileged documents, and in many cases, courts have held that they cannot be obtained through the Right to Information (RTI) Act during a pending trial. [1, 2, 5, 6, 7, 8] 

General Diary (GD) vs. Case Diary: Unlike the Case Diary, the General Diary (or Station Diary) is a record of daily events at a police station and is generally more accessible than the privileged Case Diary. [9, 10] 

AI can make mistakes, so double-check responses

[1] https://www.hindustantimes.com/cities/chandigarh-news/under-rti-act-accused-can-t-get-case-diary-of-fir-pending-trial-hc-101773261199933.html
[2] https://blog.ipleaders.in/case-diary-cr-p-c/
[3] https://www.facebook.com/vikasnagwanadv/posts/what-is-case-diary-or-police-diary-and-what-is-the-evidentiary-value/1233856892090953/
[4] https://supremetoday.ai/issue/accused-access-police-case-diary-crpc
[5] https://www.lawctopus.com/academike/use-case-diary-investigation/
[6] https://www.scribd.com/document/426225884/326611875-Maintenance-and-Use-of-Case-Diary-in-Investigation-Section-172-of-the-Code-of-Criminal-Procedure-1973
[7] https://theleaflet.in/criminal-justice/closure-report-and-police-case-diary-an-explainer
[8] https://www.facebook.com/groups/400097680157767/posts/651969664970566/
[9] https://www.legalserviceindia.com/legal/article-19809-gd-v-s-fir-understanding-the-legal-differences.html
[10] https://www.iasgyan.in/daily-current-affairs/general-diary-and-fir