Police say a 9-year-old Mississippi boy has died one day after being accidentally shot by his toddler sister. Canton Police Chief Otha Brown says the boy died in a hospital Thursday, one day after the shooting. Police say the mother’s 2-year-old daughter and 9-year-old son were outside in her car while she and her boyfriend were allegedly inside visiting with a friend. Brown says the toddler found her mother’s gun under a car seat and shot her 9-year-old brother in the head. WAPT-TV reports that their 10-year-old sibling was also in the car and witnessed the accident. Police said the mother faces neglect charges.