100 Murder Cases

Tamara Samsonova, aka the "Granny Ripper"

Samsonova is a 71-year-old Russian serial killer who murdered and ate at least 11 people from 2000–2015. She kept a detailed diary of her crimes and even confessed to killing her friend "after a quarrel over unwashed cups." She drugged the friend with sleeping pills and used a handsaw to dismember her... while she was still alive. Samsonova is also suspected of killing her husband, who she reported missing back in 2005. She is currently in prison and awaiting trial.