Belle Gunness
Around 1893, Belle Gunness killed her two kids with strychnine and then her husband, Mads Sorenson, to collect his insurance policies. She then moved to LaPorte, Indiana, where she married Peter Gunness and possibly killed one of his kids. Then, a meat grinder “accidentally” fell on his head and killed him. But Gunnnes bloodbath wasn’t over. She also murdered at least 14 people.