When writing the answer, the ideas that apply are:
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Her giving orders to Steve instead of asking him to behave a certain way - This aspect highlights her lack of respect for him and suggests a dynamic where she sees herself in a position of authority.
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Her concern that he will not take the case seriously - O’Brien’s doubts about Steve’s innocence and her comments reflect her concern that he may not approach the situation with the seriousness it deserves.
The description of O’Brien before the dialogue, while potentially informative, does not explicitly contribute to the interpretation of her doubts and lack of respect as per the context given in your prompt.