The Mississippi police officer who shot and killed 1-year-old Kohen Wiley during a confrontation over an alleged diaper theft at Walmart has resigned, just days after the state's attorney general ruled that his use of deadly force was justified.

Senatobia Mayor Greg Graves confirmed to CBS News on Friday, October 23, that Officer Hunter Foster had stepped down from the police department. His departure comes four months after he fired into a vehicle carrying the toddler, killing him and wounding another woman. Now, with body-camera footage of the shooting publicly available, the child's family is demanding a federal investigation.

Civil rights attorney Ben Crump, who represents Kohen's family, made clear that Foster's resignation isn't enough.

"Accountability can't end here.…