off the top of my head, I would say lane violation since the ball was at the shooter's disposal (based on your statement that the shooter was dribbling). Just like if anyone else on the lanes were to step inside the lane while the shooter had the ball, there would be a lane violation (delayed if opposing team's violation).
Don't have my rulebook at the moment so don't take this 100%. That's just what my interpretation of the rules is.
|