← Back to Portugal casesDaniela Calderón Padrino and Carla Martins Allegedly Murdered by João Pedro Oliveira, Matosinhos, Porto, Portugal
Case Summary
Daniela Calderón Padrino, a 36-year-old Venezuelan university researcher living in Portugal, was deliberately run over and killed by her ex-boyfriend João Pedro Oliveira on June 6, 2024, in Matosinhos, Porto. João Pedro, a 42-year-old man with a prior homicide conviction for killing a former girlfriend in 2009, was on parole and had a history of domestic violence and stalking. Daniela had filed seven formal complaints against him, reporting stalking and threats, but her case was assessed as low risk by authorities, resulting in insufficient protective measures. On the day of the crime, João Pedro premeditatedly used his car to kill Daniela by running her over multiple times. He was arrested immediately, confessed partially, and was sentenced to 25 years in prison in 2025. The case exposed systemic failures in risk assessment and coordination among authorities, raising concerns about the rehabilitation of violent offenders and protection of domestic violence victims.
Basic Information
Country: Portugal
State/Province: Porto, Portugal
City/Region: Matosinhos
Incident Type: Murder
Relationship Status: Ex-partners
Relationship Duration: Approximately 6 months (post-breakup stalking period)
Incident Date: June 6, 2024
Relationship Journey
Relationship Origins:
- Met at school/college/university
- Friends circle
- Met on social media
Relationship Stages:
- Dating
- Separated
Analysis
Contributing Factors:
- Cheating / Infidelity
- Domestic Violence Allegation
- Domestic Conflict
- Family pressure
- Suspicion of infidelity
Red Flags:
- Secretive communication patterns
- Repeated betrayal
- Escalation Pattern / Violence
- Manipulative behavior
- Threats
- Firearm Access / Concerning Weapon Behavior
- Divorce Pending / Recent Separation
- Mental Health Deterioration / Hopelessness
Motives:
- Revenge
- Jealousy
- Control/domination
- Eliminate romantic partner
Relationship Outcomes:
- Legal case ongoing
- Homicide during marriage
- Arrest made
- Investigation still ongoing
People Link Graph
Daniela Calderón Padrino and Carla Martins Allegedly Murdered by João Pedro Oliveira, Matosinhos, Porto, Portugal
Relationship Journey Graph
Origin
- Met at school/college/university
- Friends circle
- Met on social media
How the relationship or connection began.
Status
- Ex-partners
Approximately 6 months (post-breakup stalking period)
Stages
- Dating
- Separated
Important relationship phases recorded for this case.
Warning Signals
- Secretive communication patterns
- Repeated betrayal
- Escalation Pattern / Violence
- Manipulative behavior
- Threats
- Firearm Access / Concerning Weapon Behavior
- Divorce Pending / Recent Separation
- Mental Health Deterioration / Hopelessness
Reported red flags or early concern points.
Pressure Points
- Cheating / Infidelity
- Domestic Violence Allegation
- Domestic Conflict
- Family pressure
- Suspicion of infidelity
- Revenge
- Jealousy
- Control/domination
- Eliminate romantic partner
Contributing factors and possible motives from the available sources.
Incident
2024-06-06
Outcome
- Legal case ongoing
- Homicide during marriage
- Arrest made
- Investigation still ongoing
Recorded relationship or case outcome.
Sources
English labels are shown first. Original-language titles are preserved for source verification.
Daniela Calderón Padrino and Carla Martins Allegedly Murdered by João Pedro Oliveira, Matosinhos, Porto, Portugal
Letras de um Crime - Portugal · Original language: Portuguese
View original title
Daniela Padrino | Sete Queixas, Nenhuma Proteção: Um crime que Abalou Portugal (2024)
AI Intelligence Assessment
Relationship Pattern
Domestic Violence
Pattern Analysis
The relationship involved escalating jealousy, control, and stalking behaviors by João Pedro after Daniela ended the relationship. Despite multiple complaints and clear threats, systemic failures in risk assessment and coordination allowed the offender to remain free and carry out a premeditated murder. The case exemplifies repeated domestic violence culminating in lethal violence by a recidivist offender.
Investigative Notes
Authorities received seven formal complaints from Daniela reporting stalking and threats. The Agency for the Integration of Migrations and Asylum (AIMA) alerted prosecutors urgently. The risk assessment was low risk, resulting in no immediate protective measures. João Pedro was arrested immediately after the murder and held in preventive detention. He was tried and sentenced to 25 years in prison. Appeals were filed but the sentence was upheld. The case highlighted systemic failures in risk assessment, inter-agency coordination, and offender monitoring.
Investigation Confusion
No significant confusion reported; the suspect was identified, arrested, and confessed partially. The defense attempted to claim partial amnesia and mental incapacity, but expert reports rejected these claims. The timeline and evidence were clear.
Case Reconstruction / Puzzle Pieces
Daniela and João Pedro began a relationship around mid-2023. João Pedro had a prior homicide conviction and was on parole. The relationship showed early signs of jealousy and control. Daniela ended the relationship about six months before the murder. João Pedro began stalking and threatening her, sending emails and messages. Daniela filed seven complaints. Authorities assessed the risk as low. On June 6, 2024, João Pedro premeditatedly ran Daniela over multiple times with his car, killing her. He fled but was arrested after a police chase. The trial confirmed premeditation and psychopathic traits. He was sentenced to 25 years. Appeals were denied. The case exposed systemic failures in protecting domestic violence victims.
Risk Assessment
The official risk assessment classified Daniela's case as low risk despite her multiple complaints and João Pedro's violent history, reflecting systemic underestimation of danger in domestic violence cases involving recidivist offenders.
Key Takeaways
Repeated complaints and a violent offender's criminal history must be weighted heavily in risk assessments. Systemic coordination failures can allow dangerous offenders to evade monitoring. Protective measures must be timely and effective. The case underscores the need for specialized psychological input in risk evaluations and better inter-agency communication. Early intervention and victim support are critical to prevent lethal outcomes.
AI Case Q&A
What early signals mattered most?
Repeated stalking and threatening behavior, prior homicide conviction, obsessive jealousy, and multiple formal complaints were key early signals.
Which clues helped connect the case?
Threatening emails, stalking reports, prior violent history, and witness testimonies helped connect the case.
Which evidence types appeared strongest?
Surveillance footage, internet search records showing premeditation, threatening emails, witness statements, and psychiatric expert reports were strongest evidence.
Witness / Eyewitness Statements
Witness Isíro Silva observed the deliberate repeated running over of Daniela and testified in court. Other witnesses and neighbors confirmed intentionality. Police and first responders reported the arrest and suspect's confession.
How did follow-up reports change the understanding?
Follow-up reports included trial proceedings, sentencing, appeals, and expert psychiatric evaluations. The sentence was upheld by appellate courts. No further changes reported.
What remained unclear?
Final decision by the Supreme Court of Justice was pending as of February 2026.