If a man murdered

1. Alma 34: 11
     11 Now there is not any man that can sacrifice his own blood which will atone for the sins of another. Now, if a man murdereth, behold will our law, which is just, take the life of his brother? I say unto you, Nay.
2. Alma 42: 19
     19 Now, if there was no law given—if a man murdered he should die—would he be afraid he would die if he should murder?