Free Throw Violation?

[RefTip]

Watching boys Varsity game last night and the official hands the ball to our opponent for a free throw. Player takes a couple of dribbles , gets ready to shoot and the official blows the whistle. Official says that the players foot was over the free throw line and give us the ball. Opposing coach is questioning the official and he indicates that the players foot was over the line. Isn't the violation when the player shoots the ball and has their foot over the line ( not just dribbling the ball ) ?


Thanks