secret murders on american land as found in the book of mormon

Amy Kush Mormon 8:27 And it shall come in a day when the blood of saints shall cry unto the Lord, because of secret combinations and the works of darkness.
• Amy Kush Ether 11:15, 22 And it came to pass that there arose a rebellion among the people, because of that secret combination which was built up to get power and gain;
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  Amy Kush Helaman 6:17, yea, they began to seek to get gain that they might be lifted up one above another; therefore they began to commit secret murders, and to rob and to plunder, that they might get gain.
• Amy Kush Helaman 2:4,
  4 For there was one Gadianton, who was exceedingly expert in many words, and also in his craft, to carry on the secret work of murder and of robbery; therefore he became the leader of the band of Kishkumen.
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  Amy Kush 2 Nephi 26:22
  
  22 And there are also secret combinations, even as in times of old, according to the combinations of the devil, for he is the founder of all these things; yea, the founder of murder, and works of darkness; yea, and he leadeth them by the neck with a flaxen cord, until he bindeth them with his strong cords forever.
• Amy Kush 2 Nephi 10:15
  15 Wherefore, for this cause, that my covenants may be fulfilled which I have made unto the children of men, that I will do unto them while they are in the flesh, I must needs destroy the secret works of darkness, and of murders, and of abominations.
• Amy Kush 4 Nephi 1:42
  
  42 And it came to pass that the wicked part of the people began again to build up the secret oaths and combinations of Gadianton
• Amy Kush 2 Nephi 9:9
  
  9 And our spirits must have become alike unto him, and we become devils, angels to a devil, to be shut out from the presence of our God, and to remain with the father of lies, in misery, like unto himself; yea, to that being who beguiled our first parents, who transformeth himself nigh unto an angel of light, and stirreth up the children of men unto secret combinations of murder and all manner of secret works of darkness
• Amy Kush 3 Nephi 9:9
  
  9 And behold, that great city Jacobugath, which was inhabited by the people of king Jacob, have I caused to be burned with fire because of their sins and their wickedness, which was above all the wickedness of the whole earth, because of their secret murders and combinations; for it was they that did destroy the peace of my people and the government of the land; therefore I did cause them to be burned, to destroy them from before my face, that the blood of the prophets and the saints should not come up unto me any more against them.