[JRutledge]

Unsportsmanlike penalties are non-contact fouls. So your son must have said something that brought the attention of the officials.

I did not see the first action, but sometimes the contact is just apart of football. The players are sometimes unaware that the play is over and still "chicken fighting" after the play is over. So I am going to assume that your son said something after that and warranted a flag. Unless you were close enough to hear what was said, everything else is speculation

Peace