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.
On the night of August 10, 1977, Berkowitz was taken into custody by New York City police homicide detectives in front of his Yonkers apartment building, and he was subsequently indicted for eight shooting incidents. He confessed to all of them, and initially claimed to have been obeying the orders of a demon manifested in the form of a dog named "Harvey" which belonged to his neighbor "Sam". Despite his explanation, Berkowitz was found mentally competent to stand trial. He pleaded guilty to second-degree murder and was incarcerated in state prison. He subsequently admitted that the dog-and-devil story was a hoax. In the course of further police investigations, Berkowitz was also implicated in many unsolved arsons in the city.
Intense coverage of the case by the media lent a kind of celebrity status to Berkowitz, and some observers noted that he seemed to enjoy it. In response, the New York State Legislature enacted new statutes known popularly as "Son of Sam laws", designed to keep criminals from profiting financially from the publicity created by their crimes. The statutes have remained law in New York in spite of various legal challenges, and similar laws have been enacted in several other states.
Berkowitz has been incarcerated since his arrest and is serving six consecutive life sentences. During the mid-1990s, he amended his confession to claim that he had been a member of a violent Satanic cult that orchestrated the incidents as ritual murder. A few law enforcement authorities have said that his claims might be credible, but he remains the only person ever charged with the shootings. A new investigation of the murders began in 1996 but was suspended indefinitely after inconclusive findings.