Ana Paula Arruda

Status:

Open

Offense Location:

Basel / Allschwil, Switzerland

Summary:

Ana Paula Arruda was a 31-year-old Brazilian sex worker who was murdered in Switzerland on September 2, 2006. Her naked body was discovered by a jogger in the Allschwil Forest (Allschwiler Wald) in Basel-Landschaft canton. She had been strangled. The case remains unsolved, with a 20,000 Swiss francs reward offered for information leading to the perpetrator's arrest.

Vital Statistics

Circumstances of Offense:

On September 2, 2006, at approximately 6:00 AM, Ana Paula Arruda left her temporary residence at Haltingerstrasse 4 in Basel, where she had been staying with a drug-dependent acquaintance. Between 6:00 AM and 8:15 AM, she engaged in sex work on Basel's street prostitution areas. At 8:15 AM, a jogger discovered her naked, lifeless body at a remote forest path in the Senke area of the Allschwiler Wald, near Oberwilerstrasse in Basel-Landschaft canton, Switzerland. The victim had been strangled. Forensic examination confirmed death by strangulation (asphyxiation by neck compression). DNA evidence from the perpetrator was recovered from the victim's body but could not be matched to any known individuals. Investigators determined that only approximately two hours elapsed between her last known contact and the discovery of her body, indicating a premeditated crime.

Additional Details:

Despite comprehensive initial investigations, the case remained unsolved for over a decade. In 2019, Basel-Landschaft police established a Task-Force Cold Case unit to re-examine the homicide with modern forensic techniques. In November 2022, the case was reopened with new investigative findings. Specialists from Munich's police department (Polizeipräsidium München) conducted an Operative Case Analysis (OFA) that developed a refined perpetrator profile. The profile indicated the perpetrator was likely a male aged 25-35 at the time of the crime (therefore approximately 40-50 years old as of 2022). Investigators determined he possessed intimate knowledge of the Allschwil Forest and the Basel street prostitution environment, suggesting prior involvement in the local sex trade scene or previous conflicts with prostitutes. Evidence suggests the crime occurred in a vehicle and the perpetrator likely disposed of the victim's clothing. The killer was estimated to possess awareness of criminal investigative techniques. In November 2022, the case was featured on the German television program "Aktenzeichen XY... ungelöst" (a crime documentary series), which generated over ten leads from viewers. A reward of 20,000 Swiss francs was offered by Basel-Landschaft authorities for information leading to identification and arrest of the perpetrator.

Case Last Updated:

Oct 18, 2026