Complex sentence: With the absence of Amuso and Casso, power now devolved to the rival Bronx faction of the family, which included Acting boss Joseph "Little Joe" DeFede, Underboss Steven "Wonderboy" Crea and Aniello "Neil" Migliore.
Split into simpler sentences: With the absence of Amuso and Casso, family power now devolved to a ruling panel that was controlled by the rival Bronx faction of the family. This group included Acting boss Joseph "Little Joe" DeFede, Underboss Steven "Wonderboy" Crea and Aniello "Neil" Migliore.