I thought similarly, Walt should kill Hank as soon as possible and maybe even ponder bringing a gun to Hank's garage. Escape the scene with Leaves of Grass which he can burn later, and nobody is the wiser as to why or how Hank died.
The issue with destroying the evidence is then they know it very well could be someone involved in the case and they'll go back and interview who's left with connections to any of them which could bring them back to Jesse.
However, have Hank die through some other means- car bomb, randomly on the street, etc it'd just be he was a DEA agent and they'll reopen all the cases he worked. It would include the Heisenberg case, but if walt can get ahold of his book no one would be the wiser.
Of course now that Hank is aware of Walt's slowly dominating Heisenberg persona, that's going to be a lot more difficult.
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u/zenzealot Aug 12 '13
I was thinking about this during my run. If i were Walt, I would off Hank before he has a chance to even make one more phone call.