Jason Leon Schaefer Murdered by Devon Rebecca Shriner and Andrew James Richie, Longmont, Colorado, United States
This source-based behavioral analysis does not establish a clinical diagnosis, motive, or legal finding.
The case demonstrates an escalation from severe post-separation relationship acrimony into a calculated homicide driven by hostility over child custody and new romantic dynamics. Devon Shriner exhibited persistent hostility, threat behavior, and resentment toward her former partner Jason Schaefer, particularly after Schaefer began dating her sister and filed for primary child custody. Andrew Richie displayed intense infatuation and dyadic reinforcement, facilitating and enabling the planning and execution of the lethal offense.
The dynamic between Schaefer and Shriner was characterized by chronic interpersonal conflict following their separation, financial strain, workplace disputes, and intense co-parenting acrimony. The situation further destabilized when Schaefer entered a romantic relationship with Shriner's sister, compounding personal resentment. In her subsequent relationship with Richie, extreme attachment and willingness to execute extreme acts created a violent co-offender partnership.
Initial romantic breakdown and financial dispute -> Shared custody tension -> Workplace conflict leading to Shriner's job termination -> Victim beginning relationship with offender's sister -> Victim filing for increased child custody -> Joint premeditation, tracking, alibi staging, and targeted homicide.
Each entry separates the reported behavior or state from the analytical strength of the available narration.
| Behavior / construct | Person / subject | Detailed case context | Evidence |
|---|---|---|---|
| Chronic interpersonal conflict Relationship stressor | Devon Rebecca Shriner OffenderLover of victim |
Schaefer and Shriner experienced ongoing tension regarding co-parenting arrangements and financial issues after their separation. The hostility escalated to workplace incidents at the U.S. Postal Service, ultimately leading to Shriner's termination. Context or trigger: Co-parenting and financial disagreements following separation Reported expression: Ongoing hostility, verbal disputes, and severe acrimony leading to workplace disruption |
Explicitly reported Confidence: High |
| Emotional escalation Escalation | Devon Rebecca Shriner OffenderLover of victim |
When Schaefer filed court documents on October 11, 2021, seeking increased custody of his son, Shriner moved from expressed violent ideation to active execution of a murder plot within 48 hours. Context or trigger: Filing of increased child custody documents by the victim Reported expression: Transition from verbal threats and hostility to active lethal planning |
Explicitly reported Confidence: High |
| Staging or evidence concealment Post-offense behavior | Devon Rebecca Shriner OffenderLover of victim |
Shriner deliberately left her postal scanner and mobile phone at Richie's residence in Loveland while traveling to Longmont to commit the murder, intending to create a digital alibi showing she remained on duty. Context or trigger: Execution of the murder during scheduled work hours Reported expression: Leaving phone and scanner at a secondary location to generate misleading GPS location logs |
Narrative-supported psychological state Confidence: High |
| Premeditation and planning Planning or impulsivity | Andrew James Richie OffenderLover of offender |
Months prior to the homicide, Richie sent explicit text messages proposing murder scenarios involving Schaefer and researched postal scanners, demonstrating deliberate advance preparation. Context or trigger: Romantic attachment to Shriner and shared grievance against Schaefer Reported expression: Text messages suggesting murder methods and researching technical equipment months in advance |
Explicitly reported Confidence: High |
| Dyadic reinforcement Offender behavior | Case-wide |
Shriner's desire to eliminate her ex-partner converged with Richie's intense infatuation, leading them to mutually validate and execute a lethal tracking and shooting scheme. Context or trigger: Shared commitment to eliminating the victim between romantic partners Reported expression: Mutual encouragement, logistics sharing, and execution of a joint plan |
Analytical inference Confidence: High |
| Moral disengagement Cognitive pattern | Andrew James Richie OffenderLover of offender |
Richie attempted to minimize his accountability by claiming he tracked Schaefer only to warn and protect him from Shriner's plot, contradicting earlier incriminating digital records. Context or trigger: Post-arrest interrogation and trial strategy Reported expression: Reframing harmful actions as protective efforts to save the victim |
Narrative-supported psychological state Confidence: High |
Select a stage to expand it; scroll horizontally to follow the full sequence.
Schaefer and Shriner separated following financial disagreements and attempted co-parenting, which quickly devolved into high-conflict disputes.
Tensions intensified when Schaefer began dating Shriner's sister, prompting Shriner to express explicit homicide threats to acquaintances.
Schaefer filed court papers on October 11, 2021, seeking increased primary child custody, prompting immediate murder planning.
On October 13, 2021, Richie tracked Schaefer while Shriner staged her scanner alibi and fatally shot Schaefer on his mail route.
Arrows show the sequence described in the source narrative; they do not prove that one psychological state caused the next event.
Analysis is strictly based on legal proceedings, police investigative disclosures, public trial verdicts, and media reporting. No direct clinical psychological evaluations were provided in the text.