Calls for the footage have mounted in the four days since Keith Scott was shot, and the decision follows the release of footage shot by his wife.
The family of Mr Scott say he was carrying a book and not a gun.
Charlotte police chief Kerr Putney told reporters the victim was "absolutely in possession of a handgun".
Speaking at a press conference, Mr Putney released the first real details from police on a case that has been mired in controversy and uncertainty.