Lyric discussion by ivwilsoniv 

Cover art for Blame lyrics by Right Away, Great Captain!

"The children WERE lucky to have only used ears." This implies that the children only heard the crime and didn't see it, which makes more sense in context.

The children watched him kill the man which is why they WEREN'T lucky enough to only have used ears (hearing about it second hand)

and to explain why they asked if he had killed him, they didn't know whether the man was dead or not. they had never experienced something so extreme. it's almost like a child taking off the head of a bug then asking if it is dead.