(Stolen Souls pg 60) Zeta-ImpChem is a AA of interest in the CFD scandal as their many years of medical research combined with their acquisition of Cross Biomed and nanotech pioneer Microflek a few years back gives them the right kind of capabilities to have had something to do with it, though not confirmed at this time. They do seem to be covering their ass just in case, because even if they are not guilty they could still have this pinned on them as intercorporate wrangling.
(Chrome Flesh pg 201) Zeta-ImpChem remains in the chemistry game with designs on various chemical enhancements, both single use drugs and more long term treatment enhancements under the nickname of Chemoware™.
(Hard Targets pg 12) Katrina Thyssen, former (deceased) CEO of Zeta-ImpChem and confirmed headcase was actively working on a cure/solution at the time of her death.
Death may have been tied to CFD or from possible strife of the upcoming MegaCorporate Audits of which her company was backing.