When they finally arrive at gleiwitz,elie is reunited with a friend from the factory. Who is it? Describe their "reunion" as well as what happens to this friend

Elie is reunited with his friend Juliek, the boy who played the violin in Buna. They are both glad to see each other. Right before Elie falls asleep, he hears Juliek play part of a Beethoven concerto. In the morning he sees that Juliek has died and his violin has been trampled.