Please provide such proof. And don't just point out that the Cruz campaign used the CNN report to try to win over Carson voters. That is not cheating - that is what the caucuses are for, trying to get the other guy to support your guy. Unless they were knowingly using false information, it's not even unethical or immoral, let alone illegal.
No outrage over the Carson supporter that challenged Cruz being on the ballot in Illinois. Did Carson every make any comment on that?