April 17, 1977 after killing Alexander Esau and Valentina Suriani he leaves his first Son of Sam note to the police captain, talking about his father Sam who rapes and kills girls and needs blood and how he is programmed to kill. Police theorize that the killer is Scottish because of an accented word in the letter and that he is targeting brown-haired nurses because one had killed his father.
May 30, 1977 Berkowitz sends the second Son of Sam letter to columnist Jimmy Breslin and the language is more sophisticated than that of the first and they believe it was written by a calligraphist or graphic artist.
May 30, 1977 Berkowitz sends the second Son of Sam letter to columnist Jimmy Breslin and the language is more sophisticated than that of the first and they believe it was written by a calligraphist or graphic artist.