RelationWatch
OSINT Case File

Diana Enamorado Perdomo Allegedly Murdered by Gregorio Calihua-Mantiel, Hebron, Connecticut, United States

Case Summary

On March 13, 2026, in Hebron, Connecticut, Diana Enamorado Perdomo, 44, was found dead from blunt-force trauma caused by a baseball or metal bat in her home. Gregorio Calihua-Mantiel, 44, her boyfriend/domestic partner, was also found dead at the scene in a suspected murder-suicide. State police responded to a disturbance report at 3:30 a.m., found both deceased inside the apartment, and are investigating Perdomo's death as a homicide and Calihua-Mantiel's as a suicide. The incident led to road closures and school delays in the area.

Verified True
Confidence 4
Incident Date March 13, 2026
Incident Type Murder-Suicide

Basic Information

Country: United States

State/Province: Connecticut, United States

City/Region: Hebron

Incident Type: Murder-Suicide

Relationship Status: Dating

Relationship Duration:

Incident Date: March 13, 2026

Relationship Journey

Relationship Origins:

  • No data available.

Relationship Stages:

  • Dating

Analysis

Contributing Factors:

  • Domestic Conflict

Red Flags:

  • Escalation Pattern / Violence

Motives:

  • Jealousy

Relationship Outcomes:

  • Homicide during marriage
  • Suicide/self-harm

People Link Graph

Relationship Journey Graph

1

Origin

How the relationship or connection began.

2

Status

  • Dating
3

Stages

  • Dating

Important relationship phases recorded for this case.

4

Warning Signals

  • Escalation Pattern / Violence

Reported red flags or early concern points.

5

Pressure Points

  • Domestic Conflict
  • Jealousy

Contributing factors and possible motives from the available sources.

6

Incident

2026-03-13

7

Outcome

  • Homicide during marriage
  • Suicide/self-harm

Recorded relationship or case outcome.

Sources

English labels are shown first. Original-language titles are preserved for source verification.

Diana Enamorado Perdomo Allegedly Murdered by Gregorio Calihua-Mantiel, Hebron, Connecticut, United States

Original language: English

View original title

Two dead in Hebron suspected murder-suicide state police say

AI Intelligence Assessment

Relationship Pattern

Domestic Violence

Pattern Analysis

The incident involves a domestic violence pattern where a dating partner allegedly killed the victim using blunt-force trauma and then died by suicide. The conflict appears to have escalated to lethal violence within the domestic setting, consistent with murder-suicide dynamics in intimate partner relationships.

Investigative Notes

State police responded to a disturbance call and found both victims deceased inside the apartment. The homicide is under investigation with the suspect's death treated as suicide pending autopsy results. Tactical and Major Crimes teams were involved. No further details on motive or custody issues were released. The case is closed with suspect deceased.

Investigation Confusion

No reported confusion; suspect identified and deceased at scene. Cause of suspect's death pending autopsy but presumed suicide.

Case Reconstruction / Puzzle Pieces

Police responded to a disturbance at 3:30 a.m. on March 13, 2026, at an apartment in Hebron. Forced entry was made after setting a perimeter. Inside, Diana Enamorado Perdomo was found dead from blunt-force trauma, and Gregorio Calihua-Mantiel was found deceased, suspected suicide. The incident led to road closures and school delays. The relationship was dating/domestic partnership. No custody or financial disputes reported.

Risk Assessment

High risk of lethal violence in intimate partner conflict, indicated by escalation to murder-suicide and use of a blunt weapon in a domestic setting.

Key Takeaways

Early intervention in domestic conflicts is critical. Escalation to lethal violence can occur rapidly in dating relationships. Public safety measures included road closures and school delays, indicating community impact. The use of blunt instruments in domestic violence can be fatal. Suspect suicide following homicide is a known pattern in intimate partner violence.

AI Case Q&A

What early signals mattered most?

Reported disturbance call early morning indicated escalation. No prior public reports of violence available.

Which clues helped connect the case?

Police perimeter and forced entry suggested serious threat. Blunt-force trauma indicated violent assault.

Which evidence types appeared strongest?

Physical evidence of blunt-force trauma; bodies found at scene; autopsy pending for suspect.

Witness / Eyewitness Statements

Residents expressed shock and noted no prior similar incidents since 2015. No direct eyewitness accounts reported.

How did follow-up reports change the understanding?

No follow-up reports available beyond initial investigation and autopsy pending.

What remained unclear?

Exact motive and detailed relationship history remain unclear. Autopsy results for suspect pending.

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