Foreshadowing is a literary device wherein an essayist gives a development trace of what is to come later in the story. Foreshadowing frequently shows up toward the start of a story, or a part, and enables the peruser to create assumptions regarding the coming occasions in a story. There are different approaches to create foreshadowing.
Hale denounces the proceedings because it is clear that the girls are not telling the truth in their testimony. To denounce something is to explain why you disagree with it.