Hello. Will you please help me with the use of articles in English?

Question

1)The situation is as follows: I heard something bad about a person I know, for example my friend Anna, and I want to say it's not true, which is correct then "it's an unfair accusation of the honest person" or "it's an unfair accusation of an honest person"?
2)Is it necessary to use "the" in the phrase "the? human rights group Amnesty International"?
I am very grateful for your help.

Answer 1

no it is not

Answer 2

I'd say, "the human rights group, Amnesty International." However, "Amnesty International protested the human rights violations."