Rhonda Belle Martin

Rhonda Belle Martin (born Rhonda Belle Thomley; 1907 – October 11, 1957) was an American serial killer.
Murders.
A forty-nine-year-old waitress in Montgomery, Alabama, she confessed in March 1956 to poisoning her mother, two husbands, and three of her children. She denied killing two other children. According to "LIFE Magazine" in an article published at the time, she loved getting the get-well cards, and later the sympathy cards that came when the victims died, as well as taking great care to have them buried side by side in a private plot.
Her fifth husband, formerly her step-son, was poisoned like the others, but survived and was left a paraplegic. It was his illness that led authorities to look into the strange deaths surrounding Martin.
Prosecutors said collecting insurance proceeds prompted her killing spree, although this is unlikely, since she collected only enough to cover burial costs, and she never admitted this was the case.
She was convicted of murdering fifty-one-year-old Claude Carroll Martin in 1951 by surreptitiously feeding him rat poison and was executed in Alabama's electric chair on October 11, 1957. She was the last woman executed in Alabama until 2002, when Lynda Lyon Block was executed for the murder of a policeman.