His new scientific methods lead, in 1934, to the capture of Bruno Hauptmann, the kidnapper of the Lindbergh baby.

NEWYORKER: The Man in Charge

They want desperately to know why the U.S. government commuted the death sentences of the two Berga commanders, Erwin Metz and his superior, Hauptmann Ludwig Merz.

CNN: WWII slave soldiers reunite after 64 years, prepare for honors

The two Berga commanders -- Erwin Metz and his superior, Hauptmann Ludwig Merz -- were tried for war crimes and initially sentenced to die by hanging.

CNN: Lawmakers to Army chief: Honor soldiers held as slaves by Nazis

Hauptmann greeted each person, reversing the audience-actor equation.

NEWYORKER: Tea and No Sympathy

Working pro bono, Charles Vogel contacted more than 100 survivors of the Nazi slave camp after the war and built a case against the two Berga commanders: Erwin Metz and his superior, Hauptmann Ludwig Merz.

CNN: After 63 years, vet learns of brother's death in Nazi slave camp