In Mormonism, God does not forgive three sins. They are blasphemy against the Holy Ghost, apostasy and murder. With this in mind, isn’t it odd that God would choose Paul of all people to preach the gospel when he participated in Stephen’s martyrdom and then there’s David and Moses…
“A murderer, for instance, one that sheds innocent blood, cannot have forgiveness. David sought repentance at the hand of God carefully with tears, for the murder of Uriah; but he could only get it through hell…Although David was a king, he never did obtain the spirit and power of Elijah and the fullness of the Priesthood…the throne and kingdom of David is to be taken from him and given to another by the name of David in the last days…” Teachings of the Prophet Joseph Smith, pg 339.