According to Massino's testimony, Barney approached him while they were in holding together. I don't believe it for a second, though.
More and more of Massino's testimony is called into question.
It's reasonably apparent that large parts of his testimony are self-serving distortions of the truth. If not outright lies.
Yet he got his rattlesnake ranch in Arizona.
MORGAN: Why didn't you fight him at the park if you wanted to? I'm not goin' now, I'm eatin' my snack. CHUCKIE: Morgan, Let's go. MORGAN: I'm serious Chuckie, I ain't goin'. WILL: So don't go.