THE DECISION
Law 5 clearly states that the referee has the power to show cards during the half-time interval. The offending player must be shown a red card for violent conduct, be prevented from taking any further part in the match, and cannot be replaced by a substitute. If the red card is not shown on the field of play, the player’s team and the opposing team should be informed and, where appropriate, an announcement made for the spectators before the start of the second half.
Read official Law 12 ↗