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She doesn't realize she's done anything wrong.
Literal
She [topic-は] her own crime/wrong [to-に] does-not-notice.
罪 covers a spectrum from the legal ('crime') to the moral ('sin') to the everyday ('fault, wrongdoing'); context decides where the weight lands. ~に気がつく ('to notice / realize') with the negation 気がつかない gives 'doesn't notice' = 'is unaware of.' 自分の罪に気がつかない describes someone blind to their own moral or behavioral missteps — a familiar moral or literary observation, often delivered as critique.