Bouncing the Ball Hard - a Tech?

[MOFFICIAL]

My situation was my partner called a foul on B1 holding A1 dribbling down the court and A1 then bounced ball hard to the floor-I held on the "T" because it wasn't in objection to the call or showing up crew. Later same player A1 in backcourt closing in on 10 second call I hear and see the A team coach call for a timeout. I turn and blow whistle-to grant the A team timeout and hear the crowd kind of get loud I turn and ball is no where in sight then I see it land. Coach for B says that's a "T" I said I didn't see what happened. I had turned to grant TO. My partners said they didn't see the play either. In retrospect I should have had a word with A1 after the first incident-but not seeing the second slam I wouldn't have called it either. If my partners would have seen the second slam and told me about it would it have been inappropriate to give a delayed "T"?