Held Ball Situation

[dan74]

SITUATION: A1's frontcourt-ball near the baseline-most players in or around the paint and close to A1 and B1.

Players A1 and B1 both have their hands on the ball for a split second while facing the lead. They then continue struggling for another split second and end up turning their backs away from the lead, which opened them up toward the division line (and trail). Another split second goes by and the lead hasn't blown his whistle. My question: Should the trail call the held ball even though it's right in front of the lead (who quite possibly is shielded) and not in the trails area?

Wondering what you experienced officials would do...hope I explained it clearly enough. Thanks.