Serial Murder Versus Mass Murder

Two very different types of crime.

Los Angeles serial killers—the stories behind LA's worst murders

Cooling-off periods and serial homicide: A case study approach to analysing behaviour between murders - ScienceDirect

Serial or Mass Murder Cases by State

Serial killers. Mass murderers. What's the difference? - Sidney Daily News

John Wayne Gacy - Wikipedia

Serial Murder Versus Mass Murder

Swapping one evil for another: Have mass shooters replaced serial killers?

Mass Murderers, Unlike Serial Killers, Are Hard to Profile

Serial Murder — FBI