I believed it was Brutus, as he's the one giving the whole speech after the whole murder showdown went down but I'm not 100 percent sure on it. I would have to flip a book to it but that would take some time.
Dead to mean directly such as....."it's dead ahead. you won't miss it!" or "I looked him dead in the eye"
Setting. it's describing the place they are at
You didnt provide us the information for the book..?