As a retired NYPD cop hired in the 80’s I had always heard the stories from the senior guys. The Carr family, the Satanism, connections cross country, and there was more than one shooter.
My 2 cents
Multiple descriptions, some of which looked like John Carr, Berkowitz’s neighbor.
The Son of Sam letters included personal incidents only the Carr family could know
John Carr fled to North Dakota after the arrest and was involved in Satanism there as well before he committed suicide. He was sketching the symbols used by the Son of Sam there also. The other brother died shortly after in a horrific car accident. Some believe someone drove him into the obstruction.
Berkowitz admits to taking part in the documented animal sacrifice and Satanism right around the block. He admits he was not alone and others were involved. Admits John Carr was part of the cult.
Not hard to believe at least John Carr was also involved. Enjoyed the series. Seems like our old chief of D’s Borelli is one of the few who don’t believe there were others.
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Police found this note in the car of David Berkowitz, 24, who police believe is the Son of Sam killer, August 11, 1977. Berkowitz was arrested late Wednesday night in his Yonkers, N.Y., apartment. Police also found a submachine gun in the car. Police said Berkowitz would be arraigned on Thursday in Brooklyn Criminal Court. (AP Photo) 
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