I thought he was going to make it look like Henry shot him so Jack et al wouldn't know he shot AL and Libby.
Then the more I thought about it (and someone posted the idea) I thought
maybe it went beyond covering his tracks - he let Henry go on purpose.
I assumed he was going to kill Henry at first, not for revenge but on the orders of the Head Honcho.

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Have a cluckety cluck cluck day.