When does A1's free throw officially end?

A free throw officially ends when the shooter’s foot crosses the free-throw line. This is a critical moment because it initiates the next phase of play. According to NFHS rules, a player is not allowed to step on or over the free-throw line until the ball has been released. If the player does so before releasing the ball, it results in a violation, and the attempt is negated. Therefore, understanding that the free throw's conclusion is based on the movement of A1’s foot provides important clarity about the rules governing free throw attempts and the conditions under which they are considered valid.

This emphasizes the need for players to maintain proper foot placement during free throws to ensure their attempts are legitimate and to avoid giving the opposing team an opportunity to capitalize on a violation.