Sandiago was the nephew of Don Massimo Fanucci.
Biography
As Fanucci's nephew, Sandiago was known as something of an untouchable around the Hell's Kitchen neighbourhood. He was however, not involved in the business of his uncle, and opted for a respectable job.
He did, however, utilise his uncle's connections to gain himself a job at Abbandando's grocery, removing Vito Corleone from his post. Sandiago remained here until the death of Signor Abbandando, when he was fired by Chrstopher Abbandando, the new proprietor.