Complex sentence: He is quiet, but highly observant and astute in his reasoning; those faculties are invaluable in difficult cases like murder where intensive examinations of dead bodies, like an autopsy, are taboo.
Split into simpler sentences: He is quiet in his manner, but highly observant and astute in his reasoning. Those faculties are invaluable in difficult cases like murder where intensive examinations of dead bodies like an autopsy are taboo.