Not long after Raphael Prober joined Akin Gump Strauss Hauer & Feld in 2008, he was asked to head a pro bono project advocating for Holocaust survivors who were seeking reparations from France’s national state-owned railway company, which operated the trains that transported them through the country to concentration camps in Germany and Poland.

Prober, a Washington, D.C.-based attorney who specializes in congressional investigations, policy and public law, says he did not hesitate to join the effort. Prober himself has many family members who were killed in Lithuania at the outbreak of World War II. But it wasn’t until he read a memoir by a man who leaped from a train that was carrying thousands to Auschwitz that Prober says he fully understood the importance of the work he was a part of.