in the right
in the right {adj. phr.}
With moral or legal right or truth on your side; in agreement with justice, truth, or fact; correct.
When the cars collided, John was clearly in the right.
In going before his wife down the stairs, Mr. Franklin was in the right.
In many disputes, it is hard to say who is in the right.
Contrast: IN THE WRONG.
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Source: A Dictionary of American Idioms