[AgentZero]

Hmmm... This is all most interesting... I kinda like the infra-sound plant but it's a wee bit to 'techie' for the feel of my story. Though perhaps sneaking into the cities computers and making them think that the street outside her apartment needs digging up at 2am might do the trick. Hadn't thought of sleep deprivation, that might be neat.
BTW, the drugs thing is mainly to be administered to people around her, when I said 'destroyed the person he loves' I was referring to emotionally as opposed to physically fubar'd. Since the drugs are to be 'taken' by others then whether or not they're traceable isn't terribly relavent. What about PCP? I've heard it does seriously nasty things to a person, but other than that I don't know too much. Drugwise I'm looking for something that will make someone very violent and aggressive with a single dose.
As for poisons, they won't be getting used until 'endgame' and I'm mainly looking for something relatively fast acting (5-10min after ingestion), and tasteless. Whether or not it's traceable is irrelavent. Keep the ideas coming, this stuff is great! In a sick twisted depraved kinda way anyway.