Complex sentence: Massachusetts Attorney General Edward W. Brooke helped to coordinate the various police forces; he controversially permitted psychometrist Peter Hurkos to use his alleged extrasensory perception to analyze the cases, which Hurkos claimed a single person was responsible for.
Split into simpler sentences: Massachusetts Attorney General Edward W. Brooke helped to coordinate the various police forces. He controversially permitted psychometrist Peter Hurkos to use his alleged extrasensory perception to analyze the cases, which Hurkos claimed a single person was responsible for.