An "antz" who wants to show that liquid labeled at 0mg actually contains nicotine?
(why is it that Poeia's suggestion somehow seems less paranoid?)
My suggestion wouldn't work as Deej would have a paper trail showing the person knew there was nicotine in it. He'd be in some trouble for falsifying the info but he wouldn't get framed for the murder.
Actually, I just posted something similar to yours in Witch's
thread. They'd only need 0.1mg to prove that there is nic in nic-free liquids (and they could add a drop or two at home.) But if they could get several vendors to falsify the labels, it would help their cause in courts.
ETA: Yes, talking about politicians and antz does induce paranoia (and cynicism.)