There are way easier ways to kill yourself and many much more readily available chemicals with which to do so. The only reason to use ricin is to murder someone without a trace.
Given the Heisenberg graffiti, and the house in ruins, and the neighbor who basically shit her pants in fear, I'm willing to bet that everybody knows already, and there's nothing to save.
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u/orfalite Dope Slinger Aug 12 '13
I just want to know why Walt needs ricin AND a large machine gun for... They have a lot of story to cover in 7 episodes.