According to this story ,

Hamas official Mahmoud Zahar on Monday night criticized an animated video released by the group’s military wing which depicted Gilad Schalit returning to Israel in a coffin, saying Hamas “would never kill a captured Israeli soldier.”

I love the indignant tone (as I read it). Hamas might blow up innocent civilians in bomb attacks, throw its opponents off roofs, shell entire areas of Israel's south for months and years at end... but kill a captured soldier!? That would be immoral!

That's gangster ethics for you.