The family matriarch’s defense. A landmark decision in the Gilgo Beach murders case. And a mom hits the road seeking justice.

Inside the defense of Florida grandmother Donna Adelson. In Long Island, a judge's ruling on DNA ahead of alleged Gilgo Beach serial killer, Rex Heuermann's, murder trial. Plus, almost 21 years after her daughter was murdered, a mother hits the road to bring awareness to the unsolved case.