DNA Evidence Solves 13-Year-Old Dutch Murder

On the night of April 30 to May 1, 1999, 16-year-old Marianne Vaatstra pedaled her bicycle along a dark rural road near Zwaagwesteinde, between the towns of Kollum and Zwaagwesteinde, after spending Queen's Day celebrating in Kollum. She never completed her journey home. The teenager was raped and murdered, her throat slit with a knife—a brutal crime that would haunt the small community and baffle investigators for over a decade.

The murder went unsolved throughout the 2000s, remaining one of the Netherlands' most frustrating cold cases. Police had limited forensic evidence to work with, and traditional investigative methods yielded no breakthrough. The case grew colder with each passing year, seemingly destined to remain unsolved.

In 2012, thirteen years after Vaatstra's death, authorities decided to reopen the investigation with a bold new approach. On September 29, 2012, police launched an unprecedented DNA sweep of the area surrounding the crime scene. Approximately 8,000 males living within a 5-kilometer radius of where Vaatstra was killed volunteered to provide samples—a massive undertaking that reflected both the community's desire for justice and growing acceptance of genetic profiling as a investigative tool.