I believe the Trail official (whether it was his whistle that stopped play or not I don't know) was Mr. Scott Thornley. A multiple final four official... doubt his job is in jeopardy. May have still gotten an ear full.
I know he was working the game and I only saw a glimpse of a rather gray-headed official OOB when the play was stopped. I was surprized to see it happen.
And his shirt looked fine.