Complex sentence: Sephy is furious at Tobey for not becoming more of a man and telling the police who shot Callie Rose, not knowing that Tobey has sworn revenge on McAuley and plans on doing this "himself".
Split into simpler sentences: Sephy is furious at Tobey for not becoming more of a man and telling the police who shot Callie Rose. Sephy does not know that Tobey has sworn revenge on McAuley and plans on doing this "himself".