I know you’re a great researcher, so thanks very much, but I think the damage was done with Congressman King’s Tweet. It’s always best to check directly with Dr. Carson or his campaign.
King’s tweets weren’t until after 7pm. Could be that his tweets were how people found out about this, since the emails the Cruz campaign sent out were between the CNN on-air report at 6:45 and 7pm. People at the caucuses might not have seen their emails but might have seen King’s tweets.
The news report stated the truth - that Carson was not going to NH or SC, as shows on Carson’s campaign site with no upcoming events at all. King was not cherrypicking anything, unless he saw a tweet by Carson’s people saying he would still campaign (which at this point doesn’t seem to be true).