Had they arrived, they would have made it home on time.
Back then, it was common for children to walk to places in the neighborhood without their parents. But when the girls disappeared, that feeling of safety was shattered, the Gazette wrote.
The girls' father, John Lyon, was a well-known radio host in Bethesda at the time, so the story of his daughters' disappearance made the rounds.
Anonymous callers rang the family demanding money, CharleyProject.org claims. One of them demanded their father deposit $10,000 in a particular location.
He complied. No one picked up the cash. The man called again, but when asked for evidence that he actually had the girls, he broke off contact.
In the ensuing years, the tips faded. The case languished.