A Suffern High School student helped crack a more than 70-year-old John Doe case.

Ethan Schwartz, a student at Ramapo College of New Jersey, was participating at a summer bootcamp.

Schwartz worked with the college's Investigative Genetic Genealogy (IGG) team to solve the "Rock Collection John Doe" case.

Researchers were trying to identify the owner of a human jawbone.

It took Schwartz and the team fewer than two days to find a lead.

The IGG center connected the bone to a U.S. Marine Corps Captain Everett Leland Yager who died during a military training exercise in 1951.

Then, researchers took a DNA sample from the daughter of Capt. Yager to directly compare to the jaw bone profile and it came back a match.

Schwartz is the youngest person known to contribute to an IGG case.