Who stays with the play ?

[tnroundballref]

Had something come up this weekend that I wasn't sure who was responsible for covering.3 man crew - Here is the play. I am @ T going from backcourt to front court and there is a steal by B2 then as B2 is going to the bucket A1 comes in and taps the ball away from B2 towards my sideline. B3 and A3 both head towards the loose ball which carries them both OB. A3 saves the ball to A4 who then heads back up court meanwhile the coach for team A lets me know A3 and B3 were involved in some extra curricular activity OB with B3 giving A3 a shove. My question is....who covers this play? Does T need to stay in backcourt with the players OB or stay with the ball and the 10 second count? The players actually ended up @ freethrow line extended in the backcourt, My partners and I discussed it after the game and kicked the idea around that C should have stayed with the play but we still weren't 100% sure. T could have stayed with the players OB and covered it much better than C but then we neglect ball action. Thoughts...comments?