On September 21, 2013, twelve-year-old Asunta Fong Yang Basterra disappeared from Santiago de Compostela in northwestern Spain. Early the following morning, her body was found discarded alongside a dark forest track in Teo, roughly five kilometers from her family's country estate. Investigators quickly uncovered a disturbing pattern of systemic drugging, fabricated alibis, and physical evidence that pointed directly to her adoptive parents, Rosario Porto and Alfonso Basterra. Both parents were convicted of murder in October 2015 and sentenced to 18 years in prison.
The primary keyword targeted by readers researching this tragedy is Asunta Basterra case details. Search intent centers on understanding exact trial evidence, toxicology timelines, forensic findings, and why two prominent citizens killed their bright adopted daughter. Below is a complete, evidence-based breakdown of the timeline, courtroom revelations, forensic data, and unanswered questions surrounding Spain's most high-profile murder trial.
Background: The Adoption and Family Collapse
Asunta was born Fang Yong in Hunan Province, China, in September 2000. In 2001, she became one of the first Chinese children adopted by a couple from Santiago de Compostela. Her adoptive mother, Rosario Porto Ortega, was a former honorary consul of France and a respected lawyer. Her father, Alfonso Basterra Camporro, worked as a freelance journalist.
To outside observers, the family appeared affluent and intellectual. Asunta was academically gifted, skipping a grade in school while excelling in French, piano, violin, and ballet. However, domestic instability mounted behind closed doors:
- Grandparent Deaths: In 2011 and 2012, Porto’s wealthy parents died suddenly seven months apart. Both died in their sleep, leaving Porto a substantial inheritance.
- Marital Breakdown: Early in 2013, Basterra discovered Porto was having an extramarital affair. The couple divorced, but Basterra remained financially and emotionally dependent on Porto.
- Health Crises: Porto suffered from severe depression and autoimmune illness, leading to a psychiatric hospitalization in July 2013.
During summer 2013, Basterra agreed to help care for Porto on the condition that she cut ties with her lover. The parents reconciled their daily routines, but Asunta began exhibiting mysterious symptoms at school and music lessons.
Timeline of the Drugging and Murder
Forensic evidence submitted at trial proved that Asunta’s murder was not a sudden act of rage, but the culmination of months of heavy sedation using the prescription anxiolytic lorazepam (sold under the brand name Orfidal).
July 2013 -------------------> Sept 21, 2013 (5:20 PM) -------> Sept 21 (6:15 PM) -------> Sept 22 (1:00 AM)
Basterra buys 75 Orfidal Asunta leaves Basterra's Porto drives Asunta to Passersby discover
pills; teachers note child flat intoxicated; CCTV Teo house; lethal toxic body on forest trail
stumbling in class. catches her walking. dose administered. in Teo.
The Initial Poisoning (July – August 2013)
Between July 5 and July 17, 2013, records show Basterra purchased 75 Orfidal pills using prescriptions issued to Porto. During this period, Asunta missed music classes. On days she attended, academy instructors reported she could barely stand, walked like a sleepwalker, and confessed that her mother was giving her "white powders" that made her sleep for days. Her parents claimed the drowsiness was caused by strong allergy medicine.
The Night of September 21, 2013
- 1:30 PM – 5:15 PM: Asunta ate lunch with her parents at Basterra’s apartment. Prosecutors argued that Basterra crushed a massive dose of lorazepam into her food.
- 5:21 PM: CCTV footage captured Asunta walking from Basterra's building back to Porto’s flat nearby.
- 5:28 PM: Porto was recorded walking to her own flat.
- 6:12 PM: Porto’s Mercedes Benz was seen on camera driving toward her country estate in Teo, with a passenger fitting Asunta’s description.
- 6:20 PM: A gas station camera captured Porto and Asunta inside the vehicle together.
- 7:00 PM – 9:00 PM: Forensics estimated Asunta died of asphyxiation during this window. Her face was smothered with soft paper while she was heavily sedated.
- 9:30 PM: Porto returned to Santiago.
- 10:17 PM: Porto and Basterra arrived together at the central police station to report their daughter missing, claiming she had been home doing homework when Porto stepped out.
Physical Evidence Collected by Operation Nenúfar
Civil Guard investigators dubbed the investigation Operación Nenúfar (Operation Water Lily). The case rested on several key physical elements:
1. The Orange Twine
When two passersby found Asunta’s body at 1:00 AM on September 22, her arms and legs were bound with pieces of bright orange plastic rope. During a search of Porto's Teo estate, officers noticed a matching roll of orange twine in a wicker trash can, alongside discarded tissues. Gas chromatography testing proved the twine found next to the body was identical in chemical composition to the spool inside the home.
2. Toxicology Reports
Autopsy results revealed Asunta had a blood concentration of 0.68 milligrams of lorazepam per liter at her time of death—more than 27 times higher than a standard therapeutic dose. This level was lethal on its own and completely incapacitated her before she was smothered. Hair segment analysis confirmed she had been repeatedly dosed over the preceding three months.
3. Contradictory CCTV Evidence
Porto initially told police she left Asunta alone in Santiago at 7:00 PM and returned at 9:30 PM to find her gone. When detectives presented security footage showing her driving Asunta to Teo at 6:20 PM, Porto completely altered her storyAsunta Basterra Case Details: Spain's 2013 Murder Case
True Crime
On September 21, 2013, twelve-year-old Asunta Basterra Yong disappeared from Santiago de Compostela in Galicia, Spain. Her adoptive parents, Rosario Porto and Alfonso Basterra, reported her missing late that evening. Early the next morning, passersby discovered Asunta's body on a dark mountain road in Teo, a short drive from Santiago. What initially appeared to be a terrifying abduction quickly shifted into one of the most chilling legal investigations in modern European history.
Investigators soon turned their attention away from outside suspects and toward the parents themselves. As forensic evidence mounted, police arrested Rosario Porto and Alfonso Basterra for murder. The Asunta Basterra case details exposed a disturbing story of premeditated poisoning, calculated deception, and broken parental trust that shocked Spain and continues to draw international attention today.
Background: Asunta's Adoption and Early Life
Asunta Yong Fang was born in Hunan Province, China, in September 2000. When she was nine months old, Rosario Porto and Alfonso Basterra adopted her, making her one of the first Chinese children adopted in the region of Galicia.
Rosario Porto was a well-known lawyer from a prominent local family, and Alfonso Basterra worked as a freelance journalist. On the surface, the family enjoyed high social standing and material comfort. Asunta excelled at school, spoke multiple languages fluently, and showed exceptional talent in music, ballet, and violin. Teachers and acquaintances described her as a bright, polite, and gifted child.
Behind closed doors, the home environment destabilized significantly as Asunta grew older. In early 2013, Porto and Basterra divorced following Porto's extramarital affair. Despite the separation, Basterra remained closely involved in Porto's life, living nearby and assisting her during bouts of deep depression. During this period, Asunta began experiencing mysterious physical episodes that alarmed her teachers.
The Timeline Leading to the Disappearance
To understand how the crime unfolded, investigators reconstructed the final months of Asunta's life alongside the specific timeline of September 21, 2013.
Toxic Levels of Lorazepam
During the summer of 2013, Asunta missed several music classes due to severe drowsiness and dizziness. On at least two occasions, she told her academy teachers that her mother was giving her "white powders" that made her sleep for days. She reportedly stated she did not know what the powder was, but it left her so sedated she could barely walk.
Toxicology tests later revealed that Asunta had been systematically ingested high doses of Lorazepam—a prescription anti-anxiety drug commercially known in Spain as Orfidal. Alfonso Basterra had purchased massive quantities of Orfidal at local pharmacies in the months leading up to the murder, claiming it was for Porto's medical treatment.
The Events of September 21, 2013
The day of the murder followed a calculated schedule that contradicted the parents' initial statements to police:
- 1:30 PM – Asunta spent the afternoon at Alfonso Basterra's apartment, where the family ate lunch together. Forensic experts later concluded that Asunta consumed a lethal dosage of Lorazepam during or immediately after this meal.
- 5:15 PM – Security cameras captured Asunta walking with her mother toward Porto's apartment.
- 6:20 PM – Porto drove her car out of the city garage toward the family's country house in Teo. Security cameras along the route captured Porto in the front seat, with a young girl matching Asunta's description visible in the passenger seat.
- 8:00 PM – Porto returned to Santiago de Compostela, driving back without the child.
- 10:30 PM – Porto and Basterra visited the national police station in Santiago to report Asunta missing, claiming she had been home alone studying and vanished when Porto returned from an errand.
Discovery of the Body
At approximately 1:15 AM on September 22, two men walking along a quiet rural road in Teo spotted a body lying on a gravel embankment. Forensic pathologists determined that Asunta died from asphyxiation caused by mechanical suffocation—likely a pillow or soft fabric pressed firmly over her face while she was heavily sedated. The tox screen revealed more than 0.6 milligrams of Lorazepam per liter of blood in her system, a concentration high enough to render an adult unconscious.
The Investigation and Key Evidence
Police quickly identified major inconsistencies in Porto and Basterra's statements. The investigation, led by Magistrate José Antonio Vázquez Taín, uncovered physical, digital, and testimonial evidence pointing directly to the couple.
Plastic Twine at the Scene
At the dump site in Teo, officers recovered pieces of orange plastic twine near Asunta's body, which had been used to bind her arms and legs. When investigators searched Porto's rural home in Teo just hours later, they found identical orange twine inside a wastebasket, along with discarded paper towels containing traces of Lorazepam and Asunta's DNA.
Computer and Phone Disappearances
Alfonso Basterra's behavior following the arrest raised further red flags. When police initially searched his apartment, his laptop computer and secondary mobile phone were missing. Months later, during a second search of the same apartment, the missing laptop suddenly reappeared on a table in plain view. Forensic analysis showed the computer had been wiped, and digital evidence suggested someone placed it there long after police had secured the property.
Lack of Outside Intruders
Porto initially claimed that an unidentified masked man had broken into her home months earlier in July 2013 and tried to strangle Asunta, but she chose not to file a formal police report at the time. Detectives found no physical trace of an intruder, no signs of forced entry, and no evidence supporting the home invasion story. Investigators concluded the story was an early attempt to establish a cover story for Asunta's eventual murder.
The Trial, Verdict, and Aftermath
The trial began in October 2015 at the High Court of Galicia in Santiago de Compostela. It gripped the nation, generating endless coverage in Spanish media outlets like El País and international news channels.
The Defense Arguments
Both defendants maintained their absolute innocence throughout the proceedings:
- Rosario Porto claimed she left Asunta at home in Santiago while she visited the country house in Teo to drop off items. She argued that security footage showing a child in her car was misidentified or unclear.
- Alfonso Basterra maintained that he stayed at his own apartment all afternoon reading and cooking, insisting he had no involvement in giving Asunta medication or transporting her to Teo.
The Verdict
The jury did not accept the defense arguments. In October 2015, the jury unanimously found both Rosario Porto and Alfonso Basterra guilty of murder. The court sentenced each parent to 18 years in prison.
The verdict established that both parents planned the murder together over several months. While Porto carried out the physical act of transport and suffocation at the Teo house, Basterra actively participated by purchasing the drugs, administering the lethal dose during lunch, and helping conceal the plan.
Post-Trial Events
Following the trial, the legal saga took further tragic turns:
- Rosario Porto served time in several correctional facilities, including A Lama and Brieva. She suffered from severe depression and attempted suicide multiple times. On November 18, 2020, guards found Porto dead in her cell at the Brieva prison, having committed suicide by hanging.
- Alfonso Basterra remains incarcerated at the Herrera de la Mancha prison in Ciudad Real. He continues to maintain his innocence and will serve out his sentence, which runs into the 2030s.
The Motive Mystery: Why Did They Do It?
The biggest unanswered question surrounding the Asunta Basterra case details is the exact motive behind the crime. The prosecution during the 2015 trial was not legally required to prove a single definitive motive to secure a conviction, leaving several theories widely debated by criminologists:
- Financial Incentives: Early public speculation suggested Asunta might have been named a primary beneficiary in her wealthy grandparents' wills. However, financial audits proved this false; Porto was the sole heir to her parents' estate.
- Burden and Divorce: Porto suffered from frequent psychiatric breakdowns and felt overwhelmed by parental responsibilities following her divorce. Investigators suggested that both parents viewed Asunta as an obstacle to their desire for separate, independent lives.
- Pathological Dynamics: Psychological evaluations indicated an unhealthy, codependent relationship between Porto and Basterra post-divorce. Assisting Porto in a joint crime may have served as Basterra's way of maintaining control and influence over his ex-wife.
Legacy and Media Interest
The case remains a landmark subject in true crime analysis. The legal proceedings reshaped public discourse in Spain regarding international adoptions, child protection policies, and judicial transparency.
In recent years, television documentaries and dramatizations—such as Netflix's true crime series The Asunta Case—have brought these events back into global view. The resurfacing interest focuses heavily on how two wealthy, educated parents could systematically plan and execute the murder of their adopted daughter.
Key Facts Summary
- Victim: Asunta Basterra Yong (born Fang Yong in Hunan, China)
- Date of Crime: September 21, 2013
- Location: Santiago de Compostela and Teo, Galicia, Spain
- Convicted: Rosario Porto (mother) and Alfonso Basterra (father)
- Cause of Death: Mechanical suffocation combined with severe Lorazepam intoxication
- Sentence: 18 years in prison for each parent
Frequently Asked Questions
Did Asunta Basterra have any other family members in Spain?
No. Asunta was adopted by Rosario Porto and Alfonso Basterra as an only child. Her maternal grandparents passed away suddenly in 2011 and 2012, prior to the murder.
Was anyone else involved in Asunta's murder?
No. During the investigation, DNA from a third man was found on Asunta's shirt. However, police quickly determined it was a result of laboratory contamination at the forensic facility in Madrid; the man had a verified, rock-solid alibi for the night of the crime.
Why did Alfonso Basterra buy so much Lorazepam?
Basterra claimed he purchased dozens of boxes of Orfidal over several months for Rosario Porto's medical treatment. However, medical records and pharmacy receipts showed he bought far more pills than any doctor had prescribed, which the prosecution used to prove premeditation.
Where is the house in Teo where the murder happened?
The rural home in Teo belonged to Rosario Porto's family. Following the trial, the property remained vacant for years, suffered arson damage, and was eventually put up for sale by real estate administrators to pay off outstanding legal debts.
