Judy Buenoano
When it comes to cunning serial killers, no matter if they are women or men, we cannot leave out Judy Buenmoano. While it may seem like she could not be a serial killer, she committed the most horrible crimes against the people who held her the most dear: her own family! And the way she went about it was extremely cunning, as you would not even suspect her of having anything to do with it, despite her being a serial killer.
Buenoano ended up getting rid of about three people—her husband and son, then her new boyfriend—all so that she could collect their insurance money! In the end, it seems like most serial killers care only about two things: gratification for their twisted desires and money!
The most horrifying fact is that if her plot to get rid of another boyfriend had not gone wrong, then no one would have realized what she was doing to him and what he did to three other men! Her MO was to poison the people she had her eyes on with arsenic!
She had been sentenced to die for her crimes, and she then made history in Florida in 1998 as the first woman to be killed by an electric chair!