Answer: how to define the phenomenon
Explanation: The disagreement between the Federal Bureau of Investigation (FBI) and Researchers stems from the definition of serial murder.
While the Federal Bureau of Investigation explains serial murder as a series of two or more events carried out at different location and usually perpetrated by one person.
Researchers explain serial murder to mean a series a three or more killings perpetrated by one person in separate events with a break between each killing event in other to mark a distinction between serial murder and spree murder.
However, the break between each cooling usually called cooling period isn't recognized by the FBI.
