even more bizarre, stacey had both husbands mike wallace and david castor buried next to one another. in between the two was where stacey planned to be buried when she died. investigators petitioned the court for permission to exhume michael wallace's body to see if there was any connection between his death and the death of stacey's second husband david castor. a judge approved the order. >> the doctor was going to be conducting the autopsy, felt very strongly if there was some type of poisoning in his system, that it would still be there. >> why? because the active ingredient in antifreeze, ethylene glycol, in lethal amounts causes the body to create something it normally doesn't. >> ethylene glycol formed crystals which will affect the kidneys of an individual, eventually leading to death. >> those crystals remain intact for years after death, and the medical examiner found them during michael wallace's autopsy. >> upon getting the results back from the medical examiner's office, there was absolutely no doubt in my mind that stacey had killed both of her husbands. >> but just as pr