The police said the suspect, by his own account, was seized as he left home to seek out another victim, this time in the Riverdale section of the Bronx. He also said, according to police, that he had been making plans to commit a mass murder with a machine gun at a discotheque in one of the fashionable communities along the South Shore of Suffolk County. When taken into custody, he had a loaded machine gun in his car.
Outside the courthouse, sidewalk crowds chanted, “Kill, kill,” but Mr. Berkowitz was taken into the building by underground tunnel from the nearby Brooklyn House of Detention. Clad in the same blue-and-white striped short sleeve shirt and blue jeans he was wearing when arrested, Mr. Berkowitz appeared calm and alert.
Robert McFadden Aug 12, 1977 New York Times