← Back to United States casesJennifer Lannon, Matthew Miller, and others Murdered by Shawn Lannon, Albuquerque, New Mexico, United States
Case Summary
Police investigating missing people and an abandoned vehicle found the dismembered bodies of Jennifer Lannon, Matthew Miller, Justin Ma, and Randall Apostolon in a Red Ford Ranger at Albuquerque Sunport Airport on March 5, 2021. Surveillance reportedly showed Shawn Lannon driving the truck into the airport on March 3. Shawn was later captured in St. Louis, pleaded guilty to Michael Deckowski's murder in New Jersey in 2022, and pleaded guilty in 2024 to killing Jennifer, Matthew, Justin, and Randall. The source also reports that investigators cleared Danny Lamos and other persons of interest and concluded Shawn acted alone. Shawn's unverified claim of 11 additional victims was not corroborated by recovered bodies.
Basic Information
Country: United States
State/Province: New Mexico, United States
City/Region: Albuquerque
Incident Type: Murder
Relationship Status: Ex-partners
Relationship Duration:
Affair / New-Partner Context
Recorded context: Romantic-rival / love-triangle context
Reported initiator: Unclear / not reported
Relationship timing: Timing unclear / not reported
Incident Date: None
Incident Sequence and Additional Victims
Primary reported outcome: Homicide
Reported self-harm outcome: No suicide or attempt reported
Reported sequence: Order not reported / unclear
Additional victims reported: 3
Additional victim events:
- Matthew Miller — Other third party; Killed; Order not reported / unclear
- Justin Ma — Other third party; Killed; Order not reported / unclear
- Randall Apostolon — Other third party; Killed; Order not reported / unclear
Relationship Journey
Relationship Origins:
- Arranged marriage
- Met on social media
- Met during travel
Relationship Stages:
- Separated
- Marriad First Lived Together then Separately
Analysis
Contributing Factors:
- Drugs / Alchohol Use
- Domestic Conflict
- Suspicion of infidelity
Red Flags:
- Secretive communication patterns
- Deception after incident
- Escalation Pattern / Violence
- Missing Victim
- Missing Suspect
- Stalking / Repeated Harassment
Motives:
- Revenge
- Fear of exposure
- Eliminate romantic partner
Relationship Outcomes:
- Legal case ongoing
- Homicide during marriage
- Arrest made
- Weapon recovery
- Investigation still ongoing
- Deadbody recovery
Source Video
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People Link Graph
Jennifer Lannon, Matthew Miller, and others Murdered by Shawn Lannon, Albuquerque, New Mexico, United States
Relationship Journey Graph
Origin
- Arranged marriage
- Met on social media
- Met during travel
How the relationship or connection began.
Status
- Ex-partners
Stages
- Separated
- Marriad First Lived Together then Separately
Important relationship phases recorded for this case.
Warning Signals
- Secretive communication patterns
- Deception after incident
- Escalation Pattern / Violence
- Missing Victim
- Missing Suspect
- Stalking / Repeated Harassment
Reported red flags or early concern points.
Pressure Points
- Drugs / Alchohol Use
- Domestic Conflict
- Suspicion of infidelity
- Revenge
- Fear of exposure
- Eliminate romantic partner
Contributing factors and possible motives from the available sources.
Outcome
- Legal case ongoing
- Homicide during marriage
- Arrest made
- Weapon recovery
- Investigation still ongoing
- Deadbody recovery
Recorded relationship or case outcome.
AI Intelligence Assessment
Relationship Pattern
Unknown
Pattern Analysis
The source is primarily a serial-homicide investigation rather than a relationship-driven incident. Jennifer was reportedly Shawn Lannon's former wife and the mother of his children, while other victims were connected through acquaintances, drugs, or prior personal relationships. The source describes alleged deception, concealment, weapons, and escalating violence, but the broader motive structure remains partly unresolved.
Investigative Notes
Police initially investigated Matthew Miller, Justin Ma, and Jennifer Lannon as missing people. Key developments included surveillance showing Matthew's truck at Shawn and Jennifer's former residence, footage of Shawn driving the truck, witness information from Josh Hall, recovery of a handgun, and discovery of four bodies in a Red Ford Ranger at Albuquerque Sunport Airport. Shawn was arrested in St. Louis on March 10, 2021, after a nationwide search. Danny Lamos was arrested on March 25, 2021, but investigators later cleared him and other persons of interest. Shawn pleaded guilty to Michael Deckowski's first-degree murder in New Jersey in October 2022 and received a 35-year sentence. In May 2024, he pleaded guilty to killing Jennifer Lannon, Justin Ma, Matthew Miller, and Randall Apostolon and received four consecutive 15-year sentences, with an additional 60 years in New Mexico under the plea arrangement.
Investigation Confusion
The investigation initially treated Matthew's disappearance as potentially drug-related. Leoni gave an account that conflicted with surveillance footage, while Shawn denied involvement and blamed Danny Lamos. Josh Hall's allegations about a hidden bag and gun were only partly corroborated. Shawn later claimed 11 additional killings, but searches found no additional bodies, leaving those claims unverified. The source also contains inconsistent spellings for several names, including Apostolon, Apostoon, Pastelone, Deckowski, and Decowski.
Case Reconstruction / Puzzle Pieces
The case developed from a missing-person inquiry involving Matthew Miller and expanded after investigators connected Matthew's truck, Jennifer's disappearance, Justin's disappearance, and Shawn and Jennifer's former residence. Surveillance footage reportedly showed Matthew entering the residence and Shawn later driving Matthew's truck, while additional footage showed a red truck being loaded and moved. Police initially lacked physical evidence because the former residence had been renovated, but the abandoned Red Ford Ranger at Albuquerque Sunport contained four bodies, weapons, tools, gloves, and blood evidence. Airport footage then reportedly showed Shawn leaving the truck. His later confession and guilty pleas connected him to the four New Mexico victims and Michael Deckowski, while investigators concluded that other persons of interest had not assisted him.
Risk Assessment
The reported conduct indicates an extremely high risk of lethal violence, concealment, victim targeting, weapon use, and evasion. The source reports multiple killings, body dismemberment, alleged manipulation of acquaintances, flight across states, and an unverified claim of additional victims. These facts are reported as investigative findings and later guilty pleas, not as a clinical prediction.
Key Takeaways
The case illustrates how missing-person assumptions linked to substance use can delay recognition of possible foul play. Surveillance footage, vehicle tracing, witness disclosures, airport security records, and recovery of the abandoned truck were central to connecting separate disappearances. Reported concealment behaviors included damaged phones, vehicle movement, renovation of a former residence, body dismemberment, and interstate flight. The alleged 11 additional victims remain unverified and should not be treated as confirmed.
AI Case Q&A
What early signals mattered most?
The earliest important signals were Matthew Miller's unexplained disappearance despite family concern, his abandoned truck, damaged phones, rubber gloves, a shovel, and surveillance showing the truck at a relevant residence. Jennifer and Justin also disappearing within a similar period, along with conflicting accounts from people close to them, increased concern.
Which clues helped connect the case?
The strongest connecting clues were surveillance footage, the location and condition of Matthew's truck, footage of Matthew entering Shawn and Jennifer's former residence, Shawn driving Matthew's truck, witness information from Josh Hall, airport footage showing Shawn driving the Red Ford Ranger, and the four bodies and tools recovered from that truck.
Which evidence types appeared strongest?
The source presents surveillance video, vehicle records, recovered bodies, forensic observations, weapons and tools, witness statements, cell-phone and location data, and Shawn's later confession as the strongest evidence types. The source also reports guilty pleas. The reliability and legal treatment of every individual item are not independently detailed in the video.
Witness / Eyewitness Statements
Matthew's grandmother reported that his disappearance was unusual and sought police help. Matthew's girlfriend reportedly saw him enter a vehicle with Jennifer and other people. Leoni described Justin's disappearance and his alleged trip with Jennifer. Josh Hall gave police allegations about Shawn, a hidden bag, a gun, and the three missing people. Kelly denied knowing about the bag and gun. Police and airport personnel described the abandoned truck and its odor. No independent eyewitness account of the killings is reported.
How did follow-up reports change the understanding?
Follow-up reporting changed the case from a possible drug-related disappearance to a multiple-homicide investigation after the Red Ford Ranger was found with four bodies. Airport surveillance identified Shawn as the person who left the truck. His capture, later confession, guilty pleas, and investigators' decision to clear Danny Lamos changed the understanding from a multi-person suspicion to a conclusion that Shawn acted alone. The alleged 11 additional victims remained unverified.
What remained unclear?
The source does not establish a fully verified motive for every killing, the exact date of each homicide, or the complete relationship history among all victims. The reason Randall Apostolon was targeted was initially unclear. Shawn's claim of 11 additional victims was never corroborated by recovered bodies. The source also contains inconsistent names and transcript errors.