Marvin Ortiz Montecinos, 29, pled not guilty to two counts of first-degree murder for stabbing his ex-girlfriend Victoria Aparicio Cruz and her roommate Yaneth Gomez Hernandez to death in Burien, Washington, in September 2025. The attack was allegedly motivated by anger over a breakup. Cruz was stabbed over 20 times, and Gomez Hernandez suffered more than 40 stab wounds while trying to intervene. Ortiz Montecinos was found injured outside the apartment and initially gave a false account of the attack. He remains held on $10 million bail with immigration detainer issued. The case is pending with the next hearing scheduled for October 23, 2025.
Country: United States
State/Province: Washington, United States
City/Region: Burien
Incident Type: Domestic Violence Homicide
Relationship Status: Ex-partners
Relationship Duration:
Incident Date: Sept. 8, 2025
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How the relationship or connection began.
Important relationship phases recorded for this case.
Reported red flags or early concern points.
Contributing factors and possible motives from the available sources.
2025-09-08
Recorded relationship or case outcome.
English labels are shown first. Original-language titles are preserved for source verification.
Original language: English
Man pleads not guilty to stabbing deaths of two women in Burien
Domestic Violence
The case involves a violent domestic conflict triggered by a breakup between the suspect and his ex-girlfriend. The suspect allegedly killed his ex-girlfriend in an overkill stabbing attack and also murdered her roommate who tried to intervene. The attack reflects escalation of domestic violence following relationship dissolution and jealousy.
Police found the suspect injured outside the crime scene with inconsistent statements. Digital evidence showed a tense breakup conversation shortly before the attack. The suspect was charged with two counts of first-degree murder and pled not guilty. Bail set at $10 million. Immigration detainer issued. Next court hearing scheduled for October 23, 2025.
Initial suspect claim of unknown attacker contradicted by physical and digital evidence. No signs of forced entry or third-party presence. Suspect's story inconsistent with phone and location records.
On September 8, 2025, after a breakup conversation, Marvin Ortiz-Montecinos allegedly stabbed his ex-girlfriend Victoria Aparicio Cruz over 20 times in her apartment in Burien. Her roommate Yaneth Gomez Hernandez was stabbed over 40 times while trying to help. Ortiz-Montecinos sustained superficial wounds and was found bleeding outside. He initially claimed an unknown attacker but evidence including blood trails, footprints, and digital messages implicated him as sole perpetrator. He was arrested and charged with two counts of first-degree murder.
High risk due to prior breakup, escalation to lethal violence, and suspect's attempt to mislead investigators. Bail set high due to flight risk and immigration detainer.
Breakup-related domestic violence can escalate rapidly to lethal outcomes. Digital communications may provide critical evidence of motive and timing. Roommates or interveners are at risk of fatal harm. High bail and immigration detainers may be used to prevent flight in such cases.
The breakup conversation and the suspect's angry messages shortly before the attack were key early signals.
Digital message records, blood trails, single set of footprints, and lack of forced entry helped connect the suspect to the crime.
Strongest evidence included digital forensic analysis of cellphones, physical blood trails, and forensic examination of stab wounds.
Not reported.
No follow-up reports beyond initial court plea and bail setting are available.
Exact relationship duration and detailed prior history of domestic violence are unclear. Suspect's motive beyond breakup anger is not fully detailed.