Back in 2013, I saw on the Rizzuto-clan-owned funeral home's website that one of the decedents whose visitation was held there in January 2013 was an individual named Gabriele Piccirilli. I was unable to determine whether he was in any way related to Sergio. I also noted that one of the people who left online condolences was a lawyer in Niagara Falls, Ontario. When I googled this lawyer's surname to see whether there was any connection with the Piccirillis, I came up short--again, I didn't find anything.
Below is a link to the Evernote item I clipped back in 2013.