Sideline interference

[voiceoflg]

NFHS. B17 intercepts a pass at their own 10 and runs it back 90 yards into the end zone. At A's 30 the sideline judge runs into an assistant coach who was on the field. Their shoulders collided but the official was still able to run down the field.

What is the call? I wasn't there and didn't see the result in the video, but the newspaper wrote:

"Wright was picked off on the next play by Fabian Few at the 10 and the Bulldog senior return it 90 yards untouched for what looked like a game-breaking score with 0:04 left in the half.

The Thomson bench, however, was flagged for sideline interference when the side judge, trailing 15 yards behind the play, ran into the shoulder of a celebrating Bulldog assistant and nullified the touchdown with a flag."

According to the box score, the touchdown was indeed nullified.