Genealogy DNA test led police to suspect in murder of 13-year-old Iza from Gdynia

The killer of 13-year-old Iza from Gdynia was identified after a relative uploaded his DNA to an international genealogy database while researching his family history. Investigators used the database match to narrow down a list of suspects, ultimately identifying a man named Michał K. The case highlights the growing role of consumer DNA genealogy services in solving cold criminal cases.