"Weaver also claims....", " that is, we know the police....", and "like anybody who is inexperienced....".
Tone is the author's attitude toward the piece of literature, while mood is the reader's feelings. So as you read the speech, what attitude is the author trying to portray in the piece? Many times, the author will use imagery (words that spark the senses) to develop the tone. Is it scary? Somber? Suspenseful? So what are you reading in paragraph 4 that sparks the senses and sets the tone for the entire speech?