The the last time we see the heroin in No Country for Old Men, Lewellyn Moss is present. He finds they money and heroin, but takes only takes the money.
The next time we are at the scene, Anton Chigur kills the two men and pursues the money. The heroin is not shown or discussed. Did Chigur get the heroin?
The next time we are at the scene, the heroin is gone, and Ed Tom Bell knows the heroin was there, but is now gone.
Did Moss or Chigur take the heroin? Was it someone else who came and took it?