[Damian]

Unless there was some play that the lead needed to stay on top of on his right side opposite the play, he should have at least closed down when the players came to the original place at the free throw line extended at the arc. He would be in a better position to move over to get on ball, or at least be in a good position to see the crash and take the call.

This is lead's primary area (where the crash occurred) and probably had the most responsibility to make the call. However, if there were players on the right side of the lane that needed attention, the trail could have stayed with the ball and made the call.

I agree with the others that have posted that this is one place where two whistles would have been better than none and good communication with partners would keep both of you out of trouble.