Agreed. Capeci´s "scoop" is most likely the theory closest to the truth. It´s interesting to see that after the Anastasia murder, the underboss and the consigliere spots were occupied by members of that Lower East Side crew, involved with the murder. Biondo, a former leader of the crew, was made underboss and Joe Riccobono, the leader of the same crew at that time, was made consigliere. Steve Armone, who according to Capeci´s "scoop" supervised the shooters, was made the new leader of the crew. So they were all promoted to key positions within the Gambino family. Steve Grammauta, the main shooter, was a cousin of the Armones, btw.

"Manicurist Jean Wineberger said that the primary shooter was about 40 years old, 5 10 to 5 11, on the slim side, 175 to 180 lbs. He had blondish hair with a pompadour, fair complexion, and was right-handed. The second shooter, she said, was about 45 years old, 5 7, stocky build, medium complexion, and may have been Italian or Jewish."