Yes I do remember there being mention of a "double jeopardy" ruling whereby a penalty is deemed sufficient punishment, with no red card for the offender. But its either been dropped or ignored, as I've seen plenty of red card penalties given.
IMO, if its a foul that prevents a goalscoring...
RIDICULOUS non-decision on the penalty. My feeling on it was that he didn’t fancy giving it because then he’d have a decision to make on whether it was a red card as well (which it was, as Murray was in on goal). First he tried to “compromise” by awarding a corner, when the ball hadn’t even gone...