Laban, Keeper of the Brass Plates See also Brass Plates In the Book of Mormon, the man who kept the brass plates in Jerusalem at the time of Lehi’s family. Laban robbed and tried to kill Nephi and his brothers (1 Ne. 3:1–27). The Spirit led Nephi to slay Laban in order to get the plates (1 Ne. 4:1–26).