Complex sentence: He visits the homicide unit with this information but Russell, Freamon and Bunk have matched his deduction and come up with the same theory and shatter McNulty's pride by beating him to everything he was about to say.
Split into simpler sentences: He visits the homicide unit with this information, but Russell, Freamon and Bunk have already come up with the same theory. They shatter McNulty's pride by beating him to everything he was about to say.