voluntary release

[noleump]

I was recently working the plate at an USSSA tourn finals 12u. There was one out bases loaded hit to short who secures ball and makes tag on the runner from second base with time to throw to first and drops the ball.My partner calls "safe" .The play ends and time is called and the inevitible argument follows.I move down 3rd base line to hold off other coaches and allow the head coach to talk to my partner.I have the other coaches in foul territory .I look over my shoulder to se my partner getting his *** chewed .He tosses the head coach . I escort off the field the head coach.I ask my partner (in private)does he want my take or need my help or something to that affect. His reply is no.End of what matters in this story.

My question is at what point would you call an out, when a fielder with the ball tags a runner? Should there be a delay to see if he keeps the ball in his glove/hand?