HC Kimball says those guilty of shedding innocent blood must pay the atonement for that sin.
Heber C. Kimball, "Greater Responsibilities of Those Who Know the Truth," August 28, 1859, Journal of Discourses, 26 vols. (Liverpool: Amasa Lyman, 1860), 7:236
Now, the extent of that damnation is not here revealed; but I believe that all will be saved that can be reached by the redemption of Jesus Christ; and there is a way to save everybody, except those that sin against the Holy Ghost, or shed innocent blood, or consent thereto; and they will be judged as brother Pratt said they would. If a man has shed innocent blood, he will have to pay the atonement, or he never can atone for his sin; therefore, at the day of judgment he will be judged according to men in the flesh, and condemned according to the law.