It's not something we often like to think about in North Dakota. However, North Dakota has a dark past you might not have known about. While murders do happen from time to time, it's very rare that an individual gets coined a "serial killer". First, what is the actual definition of a serial killer? (Also Read: Most Terrifyingly Haunted Cemetery In North Dakota)Serial Killers In North DakotaAccording to Ghosts of North Dakota, there is one serial killer that is often forgotten about, and his story is pretty gruesome.