"I don't know why I did it"

In this quote, Susan Smith reveals confusion and unpredictability about her actions. She is admitting that she doesn't comprehend her own motives or reasoning behind her actions. This could suggest that she acted impulsively or without completely thinking through the consequences. It might likewise indicate that she is battling with guilt or regret for her actions. In general, this quote exposes a sense of inner turmoil and introspection as Susan Smith grapples with her own actions and attempts to make sense of them.