Opening lead Q♠ Table Result 3NT-1
This was a game swing at the North London club Xmas teams this week and SB South was very suspicious of ChCh's opening lead. He ducked the queen of spades and ChCh continued with a low spade, and SB played low, but the jack and another spade was the end of the contract.
SB called "DIRECTOOOOOOOOOOOOOOOOOOOOOR" in his usual belligerent tone. OO arrived. "Can you check if there is any other login from ChCh's ISP address", he asked. "That lead stinks even more than ChCh's normal smelly auctions.
"That is a serious allegation", replied ChCh, "but I will say that my sister Charlotte the Chimp, who is learning the game, was watching, but there was no communication from her." He concluded, "And in any case, the contract was cold, and you put it on the floor."
How would you handle this?