"...Genesis 5 is one of the most simple, but most powerful books there are in the old testament. It's the first time a man appears who was translated, and his name is Enoch)..."
Here is the story of Cain, the first Murderer of in this case, his brother, Abel. I'll write a bit of commentary below and I want you to pay attention, because Cain is still alive (the Mormon Church says this too) and he is a very, very old Nephilim, who accepted the mark of the beast in the days of Enoch (the second enoch, the one who was taken into Heaven. Brief commentary below the chapter: