Stella Nickell is infamous for poisoning her husband and another innocent woman. She was impulsive, swindling, and resentful. You could say she had a killer personality.

But did she do it? 

Stella Nickell Wiki

Most Famous Female Killers: Stella Nickell Insider

Murderpedia: Stella Nickell

Worldwide Women's Criminal Justice Network: Stella Nickell Wrongfully Accused