Kylee Marie Monteiro Allegedly Murdered by Gregory Groom, Rehoboth, Massachusetts, United States
This source-based behavioral analysis does not establish a clinical diagnosis, motive, or legal finding.
The case involves a young couple in a volatile dating relationship marked by escalating domestic violence, control, and jealousy, culminating in lethal violence. The victim's pregnancy and prior abuse disclosures heightened vulnerability and risk. The offender exhibited patterns of denial, blame shifting, and attempts to control communication, leading to fatal aggression.
Kylee Monteiro and Gregory Groom's relationship was characterized by frequent arguments, physical abuse, and emotional manipulation. Groom denied the pregnancy initially and sought to control Kylee's communication with others. The relationship showed signs of coercive control and escalating violence, with Groom ultimately resorting to lethal force during an altercation.
The pathway to homicide began with documented physical abuse and threats, followed by Groom's denial and minimization of the pregnancy and abuse. Repeated conflicts and attempts to silence Kylee escalated tensions, culminating in a fatal stabbing during a confrontation at Groom's home.
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 | Gregory Groom Suspect |
Groom admitted to daily arguments and accusations of infidelity involving a third party, contributing to relationship volatility. Context or trigger: Arguments involving accusations of cheating with a woman named Anna Reported expression: Frequent arguments and accusations |
Explicitly reported Confidence: High |
| Coercive control Control dynamics | Gregory Groom Suspect |
Groom admitted to physically preventing Kylee from making phone calls to report abuse, demonstrating controlling behavior. Context or trigger: Preventing Kylee from contacting others by grabbing her arms and knocking phone away Reported expression: Physical interference with communication |
Explicitly reported Confidence: High |
| Emotional abuse Control dynamics | Gregory Groom Suspect |
Groom initially claimed Kylee was lying about pregnancy and portrayed her as unstable, reflecting emotional abuse and victim devaluation. Context or trigger: Denial of pregnancy and blaming victim Reported expression: Minimizing victim's claims and shifting blame |
Explicitly reported Confidence: High |
| Fear or perceived threat Emotional state | Kylee Marie Monteiro Victim |
Kylee's text to her sister indicated a clear perception of threat from Groom, fearing lethal harm. Context or trigger: Text message expressing fear of death by partner Reported expression: Explicit fear for life and safety |
Explicitly reported Confidence: High |
| Maladaptive coping Coping response | Gregory Groom Suspect |
Groom's behavior included admissions that worsened his legal position, indicating maladaptive coping with conflict and investigation. Context or trigger: Repeated arguments and denial of responsibility Reported expression: Self-incriminating admissions and failure to de-escalate |
Analytical inference Confidence: Moderate |
| Partner absence or emotional unavailability Relationship stressor | Kylee Marie Monteiro Victim |
Groom's denial of pregnancy and abusive behavior likely contributed to Kylee's emotional isolation and distress during pregnancy. Context or trigger: Pregnancy denial and relationship conflict Reported expression: Emotional distress and isolation |
Analytical inference Confidence: Moderate |
Select a stage to expand it; scroll horizontally to follow the full sequence.
Kylee disclosed physical abuse to her sister via text messages, indicating early signs of domestic violence.
Groom denied the pregnancy and portrayed Kylee as lying, contributing to emotional abuse and victim devaluation.
Physical abuse escalated to fatal stabbing during an argument at Groom's property.
Groom physically prevented Kylee from contacting others and was charged with witness intimidation.
Groom confessed and provided a map to the burial site, indicating some level of planning post-incident.
Groom was arraigned, held without bail, and the case proceeded to court with a scheduled hearing.
Arrows show the sequence described in the source narrative; they do not prove that one psychological state caused the next event.
Analysis is limited by reliance on reported statements, police interviews, and media reports without clinical assessments. The offender's psychological state is inferred from behavior and statements, not clinical diagnosis. Some timeline details and motive nuances remain unclear.