How do you know Carmen DiNunzio is the boss? (It's Carmen, by the way - not Carmine). Are you on the streets? How do you know for sure? I'm not saying that it's impossible for Carmen to be the boss, but I've never heard any significant proof or claims that he was the boss of the family. If anything, the feds have had him as the underboss since at least as far back as 2006.
His brother, Anthony, was the "acting boss" until he got sentenced in 2012. Manocchio retired in 2009 and surrendered the position to Limone, who was his consigliere. And, in the indictment last year, the FBI had Spucky Spagnolo as the acting boss. So that would seem to me that the most reasonable option would be that Limone is still the "official" boss; whether or not he has any real power or say on the streets is unknown. He could just be a figurehead for all we know.
If Spagnolo ends up going to jail, then it very well could be that the Big Cheese ends up as the next acting boss. Hell, he very well could be the most powerful figure in Boston right now, but there is no proof that he is boss of the family.
http://www.universalhub.com/files/spucky-indictment.pdf https://www.bostonglobe.com/metro/2014/1...Jr0I/story.html http://www.salemnews.com/news/local_news...b1d940b9bb.html 
