Snakemann, don't you remember the chick they called the Black Widow in Daytona killed 2 of her husbands by putting antifreeze in their beer? If started with small doses and increased progressively, It makes the victim appear to suffer from mental illness like in dementia. The victims appears confused, and wandering and babbling. The cause of death is usually kidney or liver failure. If given over a period of time, 2 to 3 years, when death occurs, doctors/ME usually attribute it to natural causes and rarely look for poison at autopsy