Bones: Season 4, Episode 17

4 - 17: The Salt in the Wounds

Booth and Brennan investigate a petrified human body found buried in a mound of salt in a city de-icing truck. They discover that the victim was a pregnant 16-year-old high school volleyball player, and are shocked to find that nearly half of her teammates are either pregnant or already have had babies from the same father. Meanwhile, Roxie breaks up with Angela, who, seeking solace, has a one-night stand with Hodgins.