25.2 Procedure - The Referee shall ask to have announced over the public address system the name of the player designated by him or selected by the team entitled to take the shot (as appropriate). He shall then place the puck on the center face-off spot and the player taking the shot will, on the instruction of the Referee (by blowing his whistle), play the puck from there and shall attempt to score on the goalkeeper. The puck must be kept in motion towards the opponent’s goal line and once it is shot, the play shall be considered complete. No goal can be scored on a rebound of any kind (an exception being the puck off the goal post or crossbar, then the goalkeeper and then directly into the goal), and any time the puck crosses the goal line or comes to a complete stop, the shot shall be considered complete.
Should have called no goal he made a backwards motion which i thought killed a shoot out attempt but apperently not.
Backwards motion? I think you are stretching a bit there. As long as he keeps the puck in motion towards the goal line until the play is concidered complete then its ok, and he did that so its a good goal.