When to give your partner

[rfp]

Opinions please:

I'm trail at mid-court on the opposite side from the ball. My partner is lead at the baseline, same side as the ball. Defense knocks ball out of bounds and, clear to me, it knocks off the offensive players leg before going out of bounds. Since it lead's sideline, he makes the call. His call is emphatic and keeps the ball with the offensive team. He doesn't look to me for any help. Defensive team coach looks to me to overrule; I tell him it's my partner's call.

At what point does a partner volunteer help? If I run over and quietly offer my view of what happened to him, I run the risk of showing him up. If I don't offer what I saw, good chance the wrong call gets made.