Answer: due to the fact that Barry is protecting himself against self-incrimination.
Explanation:
Protection against self-incrimination:
Self-incrimination refers to saying something or a statement which make you guilt of a crime commited.
If Barry says something about the case he may say something that will lead him to being convicted of this alleged crime, sometimes without being aware that he has said a statement that is putting him in a guilty position.
It is better if someone get an advice from a lawyer who knows how to put certain statements without incriminating yourself in the process.
