Which murderer was nicknamed the Son of Sam?

David Richard Berkowitz (born Richard David Falco, June 1, 1953), also known as the Son of Sam and the .44 Caliber Killer, is an American serial killer who pleaded guilty to eight separate shooting attacks that began in New York City during the summer of 1976. Using a .44 caliber Bulldog revolver, he killed six people and wounded seven others by July 1977. As the number of victims increased, Berkowitz eluded the biggest police manhunt in the history of New York City while leaving letters that mocked the police and promised further crimes, which were highly publicized by the press. The killing spree terrorized New Yorkers and achieved worldwide notoriety.