The passage that Vicky Grant reads from LaGrassa's book contains a reference to Frank Masucci, a mob boss Stone pursues in the two-part episode "The Torrents of Greed". The Masucci family would be mentioned frequently in all incarnations of the Law & Order franchise.
Dr. Skoda: Al Napoli, the Diaper Don!
(At show-end during plea bargain)
Alberto Napoli: Two years -- maybe I'll write a book.
Episode title: Faccia a Faccia.
The episode title is based on the title of an 1967 Italian western film. the title also means: "Face to Face"
This episode appears to be ripped from the headlines of the Vincent Gigante case. Real-life mobster Vinny 'The Chin' Gigante was well-known for his eccentric tendencies.