Watched all the docs on him a few nights ago... fascinating. Hard to tell what the truth is.

I don't know about the books or anything, but in the HBO special, he did not say the man DeMeo had him kill was innocent.

He said that DeMeo told him "If you do this you have to just whack whoever I say, no questions asked. Can you do that?"

Kuklinski said he thought he could so they went to a certain place and waited until a man came around walking his dog and DeMeo said to kill him, and Kuklinski did.

He did not say the man was innocent or arbitrary, though. Likely it was someone DeMeo wanted dead anyway.