Question: With what weapon did did the subject of Summer of Sam perpetuate his murders?

<P0-S0> Summer of Sam is a 1999 American crime thriller film about the 1977 Son of Sam serial murders and their effect on a group of fictional residents of an Italian-American neighborhood in The Bronx. <P0-S1>  Although the killer David Berkowitz, his murders, and the investigation are shown in the film, the main focus is on two young men from the neighborhood: Vinny (John Leguizamo), whose marriage is faltering due to his cheating, and Ritchie (Adrien Brody), Vinny's childhood friend who has embraced punk fashion and music. <P0-S2>  The murder investigation and other contemporary events, such as the New York City blackout of 1977 and the New York Yankees' winning season, provide a backdrop to the stories of Vinny, Ritchie, and their families and friends. <P0-S3>  The film was directed and co-produced by Spike Lee, who also co-wrote the film with Michael Imperioli and Victor Colicchio. <SEP> <P1-S0> In linguistic typology, object–verb–subject (OVS) or object–verb–agent (OVA) is a rare permutation of word order. <P1-S1>  OVS denotes the sequence object–verb–subject in unmarked expressions: "Oranges ate Sam", "Thorns have roses". <P1-S2>  While the passive voice in English may appear to be in the OVS order, this is not an accurate description. <P1-S3>  In an active voice sentence, for example "Sam ate the oranges," the grammatical subject, "Sam", is the 'agent', who is acting on the 'patient,' "the oranges," which are the object of the verb "ate". <P1-S4>  In the passive voice, "The oranges were eaten by Sam," the order is reversed so that patient is followed by verb, followed by agent. <P1-S5>  However, "the oranges" become the subject of the verb "were eaten" which is modified by the prepositional phrase "by Sam", which expresses the agent, maintaining the usual subject–verb–(object) order. <SEP> <P2-S0> The "Europa" trilogy is a film trilogy written and directed by Lars von Trier, comprising his three feature films "The Element of Crime" (1984), "Epidemic" (1987) and "Europa" (1991). <P2-S1>  The films are not a narrative trilogy, but rather are linked by common themes and stylistic explorations. <P2-S2>  The overarching subject of the trilogy may be taken to be the social crises and traumas of Europe in the future. <P2-S3>  Each of the three films follows a character whose idealistic actions ultimately perpetuate the very problem he seeks to solve. <P2-S4>  Von Trier's later "USA - Land of Opportunities Trilogy" also deals with both apparent social collapse, and the ill-effects of the interventions of idealistic individuals. <P2-S5>  The trilogy also experiments with film noir conventions, and explores hypnosis and the relationship between reality and unreality. <SEP> <P3-S0> David Richard Berkowitz (born Richard David Falco; June 1, 1953), known also as the Son of Sam and the .44 Caliber Killer, is an American serial killer who pled guilty to eight separate shooting attacks that began in New York City during the summer of 1976. <P3-S1>  The crimes were perpetrated with a .44 caliber Bulldog revolver. <P3-S2>  He killed six people and wounded seven others by July 1977. <P3-S3>  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. <P3-S4>  The killing spree terrorized New Yorkers and achieved worldwide notoriety.