Polish cold case detectives charge 47-year-old man over 2009 Piła rape
Investigators from Poznań's cold case unit have charged 47-year-old Arkadiusz W. with the 2009 rape of a young woman in Piła after matching his DNA in prison, where he is serving time for assault.
Cold case resolution after 17 years
Detectives from the Poznań police cold case unit, known as Archiwum X, have resolved a sexual assault case dating back to 2009 in the western Polish city of Piła. The investigation was conducted in cooperation with the District Prosecutor's Office in Poznań and forensic specialists from the Provincial Police Headquarters. The suspect, identified as 47-year-old Arkadiusz W., was formally presented with rape charges after biological analysis confirmed an exact genetic match. Wielkopolska regional police announced the breakthrough on Tuesday, 6 October 2026, confirming that the suspect confessed to the offense during interrogation. Police representatives stated that the victim of the 2009 attack was notified of the suspect's identification during the previous week. Under Polish law, Arkadiusz W. faces a prison sentence of up to 15 years.
The 2009 crime and forensic limitations
The assault occurred after dark in 2009 in central Piła, where an unknown assailant forcibly pulled a young woman into an isolated location and raped her. Responding police officers secured biological traces at the scene and questioned potential witnesses, but investigators were unable to determine the attacker's identity. Because scientific capabilities at the time could not extract an actionable profile from the limited evidence, the case was formally discontinued due to failure to detect the perpetrator. The physical evidence remained in storage until officers from Archiwum X selected the case for a comprehensive review.
Junior Inspector Andrzej Borowiak explained the technical constraints that hindered the original inquiry:
At that time, these research techniques simply required a larger amount of biological material.
Advances in DNA profiling
Specialists from the Forensic Laboratory of the Provincial Police Headquarters in Poznań re-examined the preserved biological evidence using modern genetic methods. These analytical tools allowed forensic experts to separate complex biological mixtures and isolate a complete male DNA profile.
Borowiak detailed the methodological advances that enabled the breakthrough:
Right now, for example, it is possible to conduct tests on mixtures. Previously, that was not possible.
Armed with the newly reconstructed DNA profile, cold case investigators spent three years reviewing files and systematically narrowing down a list of potential suspects.
Prison identification and criminal record
The three-year investigative process eventually led detectives to Arkadiusz W., whom they located inside a correctional facility. The 47-year-old was already serving a prison sentence following a conviction for assault. Police officers collected a comparative biological sample directly from the inmate in prison and submitted it to the forensic laboratory. Testing confirmed that the genetic profile of Arkadiusz W. was completely identical to the evidence recovered from the crime scene in 2009.
- A woman is assaulted in central Piła, and the inquiry is discontinued after failing to identify the attacker.
- Forensic experts use updated testing methods to extract a complete male DNA profile from preserved evidence.
- Detectives systematically narrow down suspects and take a comparative DNA sample from Arkadiusz W. in prison.
- Police announce that Arkadiusz W. has been charged with rape and confessed during questioning.
Following the genetic confirmation, the prosecutor presented the rape charge, and Arkadiusz W. admitted to the crime. Police records identify him as a repeat offender with a history of convictions for offenses including theft, battery, robbery, criminal threats, and fraud.
