A bizarre story from Wisconsin -- a man and woman who appeared in Friday are accused of a scheme to kill several of the man's ex-girlfriends by poisoning them with cyanide.

Andrea Whitaker and Paul VanDuyne tried to kill women he dated before they met by putting homemade poison in elements of their daily routines, prosecutors allege.

Some of the chemicals are only allowed in research facilities, while others can be made in a lab or are common industrial byproducts.