Nibu Manjhi Allegedly Murdered by Shivbalak, Siddharthnagar, Uttar Pradesh, India
This source-based behavioral analysis does not establish a clinical diagnosis, motive, or legal finding.
This case illustrates an acute interpersonal escalation driven by unfounded suspicion, paternity distress, and rigid cognitive distortions regarding timeline calculations within an isolated live-in relationship.
The relationship formed after Nibu detached from her husband and marriage in Bihar. Relocating to Uttar Pradesh created high social reliance on Shivbalak. When Nibu became pregnant, Shivbalak's internal suspicion of infidelity disrupted the partner dynamic, turning cohabitation into severe conflict.
Dissatisfaction in primary marriage -> Secret affair and joint relocation -> Pregnancy discovery -> Unfounded cognitive distortion regarding paternity -> Repeated conflict over abortion refusal -> Premeditated nighttime lure and fatal assault -> Concealment and flight.
Each entry separates the reported behavior or state from the analytical strength of the available narration.
| Behavior / construct | Person / subject | Detailed case context | Evidence |
|---|---|---|---|
| Jealousy Emotional state | Shivbalak SuspectLover of victim |
Upon learning of the pregnancy, Shivbalak calculated the duration of their cohabitation versus the gestational timeline and concluded that the child was not his. This belief fueled intense jealousy and persistent hostility toward Nibu. Context or trigger: Discovery of Nibu's three-month pregnancy after approximately two months of cohabitation. Reported expression: Exhibited intense distress and fixed suspicion that Nibu was involved with another romantic partner. |
Explicitly reported Confidence: High |
| Premeditation and planning Planning or impulsivity | Shivbalak SuspectLover of victim |
Shivbalak anticipated the construction site's shutdown and crafted a plan to execute the assault on July 29th. He lied to Nibu about extra night work assigned exclusively to them, ensuring they would be alone at the site. Context or trigger: Nibu's repeated refusal to undergo an abortion combined with the upcoming site closure following Nag Panchami. Reported expression: Formulated a deliberate ruse to bring Nibu to an isolated workplace at night. |
Explicitly reported Confidence: High |
| Staging or evidence concealment Post-offense behavior | Shivbalak SuspectLover of victim |
After killing Nibu with a hardened cement bag, Shivbalak utilized dumped construction soil to dig a four-foot pit inside the library room, buried her body, and leveled the surface to hide the homicide from incoming workers. Context or trigger: Immediate post-assault period following Nibu's death. Reported expression: Excavated a four-foot pit in loose soil dumped inside the building and buried the victim. |
Explicitly reported Confidence: High |
| Social isolation Relationship stressor | Nibu Manjhi VictimLover of offender |
Nibu severed ties with her husband and extended family when moving to Uttar Pradesh with Shivbalak. This complete social isolation left her entirely dependent on her partner and without external assistance when conflict escalated. Context or trigger: Decision to abandon her husband, child, and hometown in Bihar. Reported expression: Relocated to a new state without family ties or social support networks. |
Narrative-supported psychological state Confidence: High |
| Detection avoidance or evasion Post-offense behavior | Shivbalak SuspectLover of victim |
Shivbalak maintained a calm demeanor, spent the night, cleaned himself, and informed the contractor he and his wife were returning to Bihar. When later called by co-workers regarding Nibu, he falsely claimed she was with him before hanging up. Context or trigger: Completion of burial and departure from the crime scene. Reported expression: Informed the site contractor that they were leaving for Bihar, then fled the state and lied during an initial phone call. |
Explicitly reported Confidence: High |
| Marital dissatisfaction Relationship stressor | Nibu Manjhi VictimLover of offender |
Persistent disputes and lack of communication in her primary marriage prompted Nibu to seek emotional attachment outside her marriage, ultimately leading to her departure with Shivbalak. Context or trigger: Discord and cessation of communication with her husband in Bihar. Reported expression: Separated temporarily, lived elsewhere, and eventually abandoned the marriage permanently. |
Narrative-supported psychological state Confidence: Moderate |
Select a stage to expand it; scroll horizontally to follow the full sequence.
Nibu experienced marital discord in Bihar, leading to emotional detachment and the start of a relationship with local acquaintance Shivbalak.
The couple relocated to Siddharthnagar, UP, severing contact with Nibu's family and living together while working as daily wage laborers.
A medical checkup revealed Nibu's pregnancy, prompting Shivbalak to suspect infidelity due to his miscalculation of relationship dates.
Faced with Nibu's persistent refusal to abort the child, Shivbalak planned her murder under the guise of late-night work at the construction site.
Shivbalak killed Nibu with a hardened cement bag while she slept and buried her body in a four-foot pit within dumped soil inside the library.
Shivbalak fled to Bihar, attempted to misdirect callers, but was ultimately located via cell tower tracking and arrested by Uttar Pradesh police.
Arrows show the sequence described in the source narrative; they do not prove that one psychological state caused the next event.
Analysis relies entirely on journalistic reports and police interrogation statements summarized in news broadcasts without direct clinical interviews.