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The Baltimore Sun

David Berkowitz

Berkowitz, a former postal worker, killed six people and wounded seven others beginning in 1976. It wasn't until the fourth attack in January 1977 that police noticed a pattern. Authorities said he targeted teen girls with long, dark hair and young couples. His nickname came from a note he left at one crime scene that read: "I am a monster. I am the Son of Sam." After his 1977 arrest, Berkowitz told police he was following the demonic orders of his neighbor's dog. He is serving six consecutive 25-years-to-life sentences. Associated Press