[Mark T. DeNucci, Sr.]

This is a case when you do not immediately signal two or three points. You were correct in sounding your whistle for the possible defensive BI, but you need to let your partner now that you had a possible defensive BI. The foul by B1 against A1 may have been a common foul and not a foul against by B1 against A1 who is in the act of shooting. If A1 was in the act of shooting your partner that score the points for BI. If the foul was a common foul the ball was dead immediately and the touching of the ball by B2 is not a violation of the rules.