Bihar police have cracked the sensational murder case of Dev Kumar Gunjan, who was shot dead on a moving train. Investigation revealed that his wife, a government officer, conspired with her lover to orchestrate the hit for Rs 4 lakh.

Key Takeaways

  • A deadly love triangle emerged among three colleagues who joined the electricity department together in 2017.
  • Wife Smita Kumari (MVI) and her lover Ajit Kumar hired a contract killer for Rs 4 lakh cash to eliminate Dev Kumar.
  • The murder, initially staged as a train robbery near Badlaghat, was cracked using advanced digital forensics and CDR analysis.

A complex and chilling conspiracy that began within the corridors of a government office in 2017 has culminated in a sensational murder on a moving train in Bihar. The state police have successfully cracked the homicide case of Dev Kumar Gunjan, revealing a deadly plot masterminded by his wife, Smita Kumari, and her former colleague-turned-lover, Ajit Kumar. The duo allegedly paid Rs 4 lakh to a contract killer to eliminate Dev Kumar, who was seen as an obstacle to their relationship.

The Genesis: From Colleagues to a Fatal Triangle

The backstory dates back to 2017 when Dev Kumar, Smita Kumari, and Ajit Kumar joined the Bihar Electricity Department together in Sitamarhi. Working closely, Dev and Smita fell in love and tied the knot in 2018, later welcoming a daughter. Over time, career progressions led to transfers; Dev was posted to Jamui, while Ajit moved to Nalanda. In 2023, Smita's career advanced further when she was selected as a Motor Vehicle Inspector (MVI) and posted to Supaul. It was during this period that Smita and Ajit rekindled their close association, which eventually evolved into an extramarital affair.

The Staged Robbery on the Jansadharan Express

According to the railway police, as the affair intensified, Dev Kumar became a major hurdle for the lovers. The duo contacted a hitman named Raju Kumar alias Dheeraj from Jehanabad and finalized a contract of Rs 4 lakh, paid in cash to avoid any digital footprint. On June 11, 2026, while Dev Kumar was traveling aboard the Jansadharan Express to meet his wife in Supaul, the hired shooter boarded the train and shot him near the Badlaghat railway station. Dev succumbed to his injuries during treatment, and Smita initially tried to frame the incident as a robbery gone wrong.

How Digital Forensics Cracked the Case

The cover story quickly fell apart under rigorous investigation. A Special Investigation Team (SIT) led by the Barauni Railway Sub-Divisional Officer, along with the Special Task Force (STF), shifted focus from physical evidence to digital footprints. By analyzing Call Detail Records (CDR), mobile locations, and suspicious communication patterns, investigators exposed the continuous contact between Smita and Ajit. The scientific evidence directly linked the duo to the contract killer, leading to the arrest of all three accused.