Crew member John Nieder or Neider 305th BG

[Rolfeb]

Hi All,
at July 21st 1944 a B-17, #42-97350, piloted by Leonard Kornblau was shot down in South West Germany.
At that day John Neider or Nieder was replaced by Bill Boyd because of illness.
I'm looking for some more information about John Neider.
Because his crew didn't come back, was he flying woth another crew?
Did he survive the war?
His his family name Neider or Nieder?

Thank you very much in advance
Rolf