Ernest Hemingway famously struggled with alcoholism and mental illness for decades before taking his own life in 1961.

During a 10-day spree in March 2013, Joanna Dennehy killed two of her roommates and her landlord before attempting to butcher two more men she randomly encountered walking their dogs.

In the early 1800s, John Bell and his family were reportedly haunted by a malevolent spirit dubbed the Bell Witch — an ordeal that ultimately ended in murder.