Well, Cain and Abel were the first two sons of Adam and Eve. Abel was into shepherding and Cain worked the land. When it came time to offer sacrifices to God, Abel offered the best of his lambs. Cain, on the other hand, offered some of his crops. God had regard for Abel's offering but not Cain's. This made Cain extremely jealous. In a fit of rage, Cain lured Abel out to the field and murdered him. As a result, God cursed Cain. He put a mark on Cain so that no one who found him would kill him, but Cain had to live as a wanderer for the rest of his life.
I'm not sure specifically which 'Abel Cedeno' you are referring to. There could be many people with this name. Can you provide more context like where he is from or what field he is associated with?