Investigators estimated at least 25 people were buried at Harold Baumeister's estate, based on evidence that included 10,000 bones and bone fragments.

It's a criminal investigation breakthrough nearly two decades in the making. Advanced DNA identified the remains of a woman found in an abandoned Detroit house as Marilyn Washington.

Decades after investigators unearthed thousands of human bones and bone fragments on a suspected Indiana serial killer’s property, a renewed quest is playing out in laboratories to solve a long-running mystery: Who were they?