Typing Call Detail Records (CDR) for Criminal Cases: AI to DOCX in Minutes

What a Call Detail Record Contains

A call detail record from an Indian telecom operator is a machine-generated log of every communication event on a mobile number. It typically lists the calling party number, called party number, call start time, call duration, call type (incoming, outgoing, missed), and SMS details. Cell tower location is captured through Cell ID, LAC, and CGI fields, pinning a handset to a specific tower at the moment of the call. IMEI numbers identify the handset itself. In criminal investigations, records from locations such as Hazaribagh or Vellore arrive as printed sheets or scanned PDFs that run dozens of pages. A clean typed copy makes that data searchable and easier to analyse without altering the original.

Why CDRs Are Crucial in Criminal Investigations

Law‑enforcement agencies and legal teams rely on CDRs to establish a suspect’s whereabouts, map communication links between individuals, and reconstruct timelines. The records help answer: who called whom, when, for how long, and where each device was located. Under Section 65B of the Indian Evidence Act, electronic records are admissible provided a certificate accompanies them. A typed CDR, especially one that faithfully reproduces every field, speeds up internal review, charge‑sheet drafting, and bail arguments. It lets investigating officers and advocates highlight relevant call patterns without squinting at faded printouts. The typed version remains a working copy; the certified original from the operator holds evidentiary weight in court.

AI Typing vs Manual Typing: When Each Approach Fits

AI typing turns a scanned CDR into an editable DOCX in minutes. That speed makes it ideal for case preparation, internal analysis, and sharing drafts with colleagues. Lekhak’s self‑serve AI typing produces a high‑quality reproduction that preserves columns, timestamps, and phone numbers, but it is not a certified true copy. If a court or investigating authority requires a manually typed and notarised true copy, often needed when submitting electronic evidence under Section 65B, a separate manual typing and notarisation process must be arranged. For most pre‑trial work, the instant AI output is the practical choice: you can search, annotate, and extract call patterns immediately without waiting for human typing.

What Lekhak’s AI Typing Produces

Upload a scanned PDF or image of a CDR string, and Lekhak’s AI typing engine returns a single DOCX file within minutes. The output preserves the original layout, rows for each call event, columns for date, time, calling party, called party, duration, IMEI, cell tower information, and SMS content. No translation occurs; the data stays in English exactly as it appears on the source pages. The DOCX is fully editable, so you can annotate, highlight, or redact before sharing. Because the process is automated, there is no wait for a human typist. The AI handles large batches of pages consistently, making it suitable for CDRs that run to 100 pages or more.

Typical Fields and What They Mean

A CDR contains several abbreviations that appear repeatedly. Understanding their meaning helps in interpreting call patterns.

Abbreviation	Full Form	Description
IMEI	International Mobile Equipment Identity	Unique 15‑digit identifier of the mobile handset; unchanged when the SIM is replaced.
IMSI	International Mobile Subscriber Identity	Unique identifier tied to the SIM card; identifies the subscriber on the network.
LAC	Location Area Code	Code that groups a set of cell towers under one network area; helps narrow the handset’s location.
CGI	Cell Global Identity	Combination of LAC and Cell ID, uniquely identifying a specific cell tower.
Cell ID	Cell Identity	Numerical identifier of the individual base station that handled the call.
Call Type	,	Indicates whether the event was an incoming, outgoing, or missed call, or an SMS.
Duration	,	Length of the call in seconds; zero for missed calls and SMS records.
Timestamp	,	Date and time of the call event, usually in DD‑MM‑YYYY HH:MM:SS format.

In CDRs from investigations around Hazaribagh or Vellore, these fields are printed in a fixed‑width layout that the AI typing preserves accurately.

How to Obtain an Original CDR from the Telecom Operator

If the original CDR sheet is lost, damaged, or required as certified evidence, you can request a duplicate from the mobile network operator. Operators are obligated to maintain call records for a period specified under their licence conditions. Individuals can file a request under the Right to Information Act, 2005, though operators may cite privacy exemptions. Law‑enforcement agencies and courts can directly seek a certified copy under the Code of Criminal Procedure or through a court order. The duplicate CDR will be a printed or digital file directly from the operator’s logs, which can then be typed using Lekhak’s AI for quick analysis while keeping the certified original intact.

Frequently Asked Questions

How fast is Lekhak’s AI CDR typing?

Most CDR files finish in a few minutes. A 50‑page PDF of call logs typically returns the editable DOCX within 5–10 minutes of upload. Speed depends on page count and image clarity; the platform processes all pages in parallel.

Is the typed DOCX admissible as evidence in an Indian court?

The AI‑typed output is a working copy, not a certified true copy. Under Section 65B of the Indian Evidence Act, electronic evidence requires a certificate from the person in charge of the system. Courts may require the original operator‑issued CDR accompanied by a Section 65B certificate.

Can Lekhak type handwritten CDR notes or police‑prepared call charts?

Yes, provided the handwriting is legible. The AI OCR handles clear handwritten numbers and printed text well. Severely smudged or cursive writing may need manual review; the platform still returns a best‑effort typed output.

Does the AI typing preserve columns and timestamps exactly?

The AI engine detects the table structure of a CDR and reproduces each column, date, time, party numbers, duration, IMEI, cell tower, as separate table cells in the DOCX. Minor alignment shifts are rare; you can adjust the table after download.

What file formats can I upload?

Lekhak’s typing service accepts PDF, DOCX (as a scanned image embedded file), JPEG, PNG, WebP, and TIFF. If your CDR is a blurry photo from a phone camera, the AI still produces a readable DOCX, though best results come from a flat scan.

Will my call data remain confidential?

Yes. Files are encrypted during upload and processing. Lekhak does not store typed documents or source files after the session ends; temporary copies are purged automatically. The platform is designed for sensitive legal documents.

Can I edit the typed DOCX after downloading it?

Absolutely. The output is a standard Microsoft Word document. You can highlight, redact, annotate, or add column headers. Many legal teams insert call‑event notes directly alongside the typed CDR before presenting it in internal discussions.

Does Lekhak offer notarised true copies of typed CDRs?

No, Lekhak’s self‑serve AI typing is not a notarised true copy. If your court submission requires a manually typed and notarised true copy, you will need to engage a typist and notary separately. Lekhak’s output helps you prepare the analysis quickly, not supply the certified exhibit.

Can I use Lekhak to type CDRs that are in Hindi or other Indian languages?

Lekhak’s typing service works for any language, but this article discusses English CDRs. If your CDR has Hindi column labels or has been scribbled with notes in a regional language, the AI typing will still capture the characters. For typed‑to‑typed translation into English, you can then use Lekhak’s translation tool.

What is the cost of typing a large CDR file?

Pricing is credit‑based; see lekhak.app/pricing for current rates per page. Each typed page consumes a set number of credits. Free trial credits let you test the service on a sample of your CDR before processing the full file.