Teachings of Ezra Taft Benson, pg. 98; “Six of the original Twelve Apostles selected by Joseph Smith were excommunicated. The Three Witnesses to the Book of Mormon left the Church. Three of Joseph Smith’s counselors fell-one even helped plot his death. A natural question that might arise would be that if the Lord knew in advance that these men would fall, as He undoubtedly did, why did He have His prophet call them to such high office? The answer is: to fill the Lord’s purposes. For even the Master followed the will of the Father by selecting Judas. (Title of Liberty, p. 217.)”
Proverbs 19:5; “A false witness shall not be unpunished, and he that speaketh lies shall not escape.”
Let’s say the BoM witnesses were wrong to denounce Smith and Mormonism. If that’s the case then we see in Proverbs 19:5 that God will take care of them. But, if we look at the evidence we know with certainty the witnesses to the BoM retracted their statements and subsequently left the Church because they found out Joseph Smith was a false prophet. So we see that Smith will be in the category of not being able to escape.