Short answer: No.
Longer answer: Yes, some people here have cited or posted earlier scripts that indicated that Rocco had something to do with the Tahoe shooting. Many earlier scripts exist with radically different plot lines than what we saw. But I stick with the final cut, because that's what FFC intended us to see.

I go with my much-posted (if plaw, rest in peace, were with us, he'd groan) theory: Rocco, outdistanced by Neri in the family pantheon, was given a no-options proposition by Michael. He took it because he saw it as his last chance to regain status in the family. Michael offered it to him because he saw Rocco as expendible at that point, but he wanted Neri to remain. Rocco, let's remember, was Clemenza's protege; Neri was Michael's.