Interesting backcourt violation

[hilltopperref]

Had this happen last night. I think my partner got it right but feel free to chime in.

Situation;

A1 attempts a 3 pont shot. B1 blocks the attempt. The ball is batted to almost half court when the ball goes off of A2's shoe. A1 retrieves the ball in the backcourt, partner call a violation. A team coach goes nuts. I think my partner got it right. what do you think