Thousands submitted DNA to police to help solve a 1998 Dutch boy’s killing. One man was conspicuously missing.

Police only thought Jos Brech was curious when he rode his bicycle past an active crime scene in a forest in the Netherlands in August 1998.
The officers had just recovered the body of 11-year-old Nicky Verstappen, who, on a summer camp trip, had disappeared from his tent the night before. The boy had been raped and killed, police said, in a case that would haunt the nation in the decades to come.
But, that night, Brech said he didn’t know anything. Police took his name and let him go.
They kept his name for a long time — until finally, this year, it came up again.