Complex sentence: But Majuri wanted to control the entire DeCavalcante family himself, and therefore he reached out to soldier James "Jimmy" Gallo into murder his rival Vincent Palermo, who instead told Palermo of the plot, and decided to have Majuri murdered.
Split into simpler sentences: But Majuri wanted to control the entire DeCavalcante family himself, and therefore he reached out to soldier James Gallo to murder his rival Vincent Palermo. Gallo instead told Palermo of the plot, and decided to have Majuri murdered.