Describe John Anderton's inner conflict.

While John Anderton is the sharpest and best cop in the PreCrime department, he is plagued by neuroses and haunted by his past. At work, he is highly competent, determined to look into the future to help people escape death. When he leaves at the end of the day, he is a drug addict, going off into dark alleyways to buy neuroin and watching old home videos of his missing son and estranged wife. While his job sends him running bravely into the future, John spends much of his time steeped in the past, guiltily grasping for a way to rewrite the trauma he has gone through.