This article purports that Daniel was Joe's grandson (son of William). no idea how credible this source is, by the by.
William Bonanno? Is the person in the article referring to Salvatore "Bill" Bonanno?
As far as i know Bill Bonanno had 3 sons....Joseph, Salvatore and Charles. No Daniels or Danny.
Did Joe Bonanno have more then 2 sons? I only know of Bill and Joseph Jr.
Salvatore is what I -think- the author meant, but I can't confirm. Like I said, I can't vouch for the integrity of the article and it was the only article I could find on the incident which is slightly odd.
Read the comments where the person is claiming to have some knowledge of the situation. The way he writes reads fairly similarly to our facebook fraud.
Edit 2: The above article, in the comments (not the article itself), mentions Daniel wanting to become a chef. I found this article on a chef named Daniel Bonanno: