The attack in Schiedam
On June 22, 2000, ten-year-old Nienke Kleiss and her eleven-year-old friend Maikel were attacked in a park in Schiedam. Nienke was killed and Maikel was seriously injured. The crime produced an intensive investigation and enormous pressure to identify an offender.
That pressure did not lead the justice system directly to the correct person. A local man, commonly identified in Dutch reporting as Cees B., became the focus of the investigation and was eventually convicted even though important evidence did not fit him.
The wrongful conviction
Cees B. was arrested in 2000 and was ultimately sentenced on appeal to 18 years in prison and compulsory psychiatric treatment. He maintained that he was innocent. Later official evaluations concluded that police, prosecutors and other parts of the criminal-justice process had made serious errors in the way the case was handled.
The case became especially troubling because forensic material was capable of excluding him. When another man later confessed, renewed examination of the evidence showed that DNA characteristics from material associated with the crime matched the new suspect and not the man already serving the sentence.
A confession changes the case
In 2004, Wik H. came forward and said that he had committed the offenses. The confession was not accepted on its own. The Netherlands Forensic Institute re-examined biological material, and the Supreme Court later summarized DNA findings that supported the new suspect and excluded the previously convicted man.
In one key comparison, the Supreme Court recorded that the DNA profile derived from material found on Nienke contained characteristics matching Wik H. and not Cees B.; the chance that a randomly selected man would share those characteristics was calculated at approximately one in 900,000. Y-STR findings from other evidence were also consistent with Wik H. and inconsistent with the wrongfully convicted man.
Review and exoneration
On January 25, 2005, the Dutch Supreme Court granted review of the earlier conviction. The combination of the new confession and the forensic evidence was sufficiently significant to reopen a case that had already become final.
The legal process then moved toward clearing Cees B. Government and judicial sources acknowledged that an innocent person had spent more than four years imprisoned for the crime. Later proceedings made clear that renewed prosecution of him for the same facts was no longer legally tenable.
The case against Wik H.
Wik H. was prosecuted separately for the Schiedam offenses and other crimes. The Rotterdam court initially imposed 20 years in prison plus compulsory psychiatric treatment. On November 22, 2005, the Hague Court of Appeal convicted him and imposed 18 years of imprisonment together with TBS, the Dutch measure for compulsory psychiatric treatment.
The appellate judgment is important because it provides the definitive adjudication of the second prosecution. It also prevents a common mistake in retelling the case: the first wrongful conviction and the later conviction were not competing unresolved theories. The Dutch justice system formally recognized the first conviction as a miscarriage of justice and convicted Wik H. in the new prosecution.
Why the case changed Dutch criminal justice
The Schiedammer Park murder became a national example of how confirmation bias, poor handling of contradictory evidence and institutional assumptions can produce a wrongful conviction. The Dutch judiciary’s 2005 annual report described the case as one of the year’s most consequential events and an important learning moment for the courts.
The fallout also contributed to new mechanisms for re-examining potentially unsafe convictions. The case therefore belongs not only in the history of a murder investigation, but also in the history of Dutch safeguards against miscarriages of justice.
Timeline
June 22, 2000: Nienke Kleiss is murdered in Schiedam and Maikel survives a serious assault.
2000–2002: Cees B. is prosecuted and ultimately receives an 18-year sentence plus TBS on appeal.
2004: Wik H. confesses; renewed forensic work produces DNA findings inconsistent with Cees B. and supportive of Wik H.
January 25, 2005: the Dutch Supreme Court grants review of the earlier conviction.
April 2005: a Rotterdam court convicts Wik H. and imposes 20 years plus TBS.
November 22, 2005: the Hague Court of Appeal imposes 18 years plus TBS.
2005 onward: official evaluations examine how the wrongful conviction occurred and what institutional changes are required.
Current status
The murder case is adjudicated, and the wrongful conviction is formally recognized. Wik H.’s conviction replaced the false narrative that had sent Cees B. to prison. The case remains a major Dutch reference point for the risks of tunnel vision and the importance of treating exculpatory forensic evidence as seriously as incriminating evidence.
Sources
- Hoge Raad — review judgment, DNA findings and confession (January 25, 2005)
- Gerechtshof ’s-Gravenhage — Wik H. appeal judgment and sentence (November 22, 2005)
- Hoge Raad — later ruling confirming the legal finality of the exoneration process (October 2, 2007)
- De Rechtspraak — 2005 annual report on lessons from the Schiedammer Park murder miscarriage of justice