Abusive Calls And SMS

 

📝 Case Study Report: Abusive/Threatening Calls Investigation

📌 Case Summary

• Victim: Sangeeta, a working professional

• Nature of Complaint: Receiving repeated abusive calls from an unidentified number

• Reporting Trigger: Encouraged by her friend Supriya to file a complaint

• Investigating Officer’s Objective: To trace the perpetrator, analyze digital evidence, and file appropriate charges

🕵️ Step-by-Step Investigative Procedure

Step	Action	Objective
1	Interview complainant	Gather firsthand details of calls and context
2	Classify case type	Confirm it falls under "Abusive Call" category
3	Request CDR	Send 92 CrPC notice to service provider’s Nodal Officer
4	Validate CDR	Confirm correct number; request resend if mismatched
5	Convert & analyze	Change file format to CSV/XLS for Excel-based analysis
6	Format numeric fields	Modify IMEI, IMSI, and phone numbers for 15-digit clarity
7	Geolocation mapping	Use Cell ID data to extract location (lat/lon, address)
8	Analyze call patterns	Identify frequency, duration, caller identity, location
9	Correlate with SDR/CAF	Cross-verify user identities and records
10	Interpret hexadecimal SMS logs	Use ASCII converters; seek company KYC via 91 CrPC
11	Legal reporting	Complete charge sheet with IT Act & IPC sections

📊 Sample CDR Insights (Excerpt)

• High frequency calls from one Maharashtra-based number

• Repeated call durations between 20–90 seconds

• SMS sent using hexadecimal-coded sender IDs, possibly automated platforms

⚖️ Legal Framework Applied

• IPC 354D: Stalking via electronic communication

• IPC 506: Criminal intimidation

• IPC 509: Intent to insult modesty of a woman

• IT Act Sections (as amended): For misuse of telecom and digital platforms

🔍 Conclusion

• Perpetrator: Deepak, a colleague of Sangeeta, previously rejected by her

• Motive: Revenge, after discovering her number on a matrimonial site through premium access

• Outcome: Sufficient evidence extracted through CDR, SDR, and digital trace for legal action

🔐 Preventive Measures

• Avoid sharing personal contact on public digital platforms

• Use caller identification and blocking apps

• Report unusual behavior early to authorities

• Platforms should implement stricter privacy filters for premium users