Antonio Boggia (23 December 1799 – 8 April 1862), aka "Il Mostro di Stretta Bagnera" (The Monster of Bagnera lane) or "Il Mostro di Milano" (The Monster of Milan), is considered the first serial killer of Italy.

William Edward Cook Jr. (December 23, 1928 – December 12, 1952) was an American spree killer and mass murderer who murdered six people, including a family of five, on a 22-day rampage between Missouri and California in 1950–51.