End of Game Clock- Rule vs GM

Worked a Varsity game last year that was a 2 point game in the final minute. Winning team was inbounding near the division line with about 7.5 seconds left, defender immediately slapped ball out of bounds. I'm C tableside. I look at the clock, no time had come off. Winning coach behind me starts screaming to take time off. I tell him we didn't have definite knowledge, etc. and can't take time off. I turn back to the court and here comes Trail (also the R) across the court straight to the timer where he takes off .3 seconds. Not sure if the losing coach called the assignor but I'd like to hear how that conversation went.