How do you know this? Where'd you read this at? I think the feds may have already had a suspicion, and the mobsters themselves knew what happened and why, almost immediately after Phil Testa was murdered. From the stories Leonetti & Caramandi gave, the implication is that pretty much the entire Italian underworld from Philly to NY and Jersey in between, knew whom was behind the Testa hit. I find it hard to believe the Narducci's were the only ones who didn't know.I believe they may have already been involved with that life with their father, prior to him being killed. So if you ask me, I think they had to have some idea as to what happened. Just because Frank Narducci was intentionally mislead at first, by Scarfo & Co. doesnt mean the two brothers were so gullible when their father was eventually killed.