Wendi Mae Davidson kills her husband by injecting him with drugs that are normally used to euthanize animals.
Meanwhile, Anu Singh was a troubled young woman who planned to commit suicide and threw a party to celebrate her final day on the earth; but no one knew she was planning to take her fiance with her. While Joe died after being given multiple shots of heroin, Anu didn't die.
And black widow Lynn Turner married two police officers while working as a dispatcher. When she got bored with her husbands, she simply killed them by poisoning them with ethylene glycol(aka antifreeze)hidden in a bowl of Jell-O.