Towards the end of the film, Sheriff Bell reaches the motel to find a firefight occurring and what seems to be some cartel members fleeing on a truck. He also sees the lady who had been flirting with Llewelyn beside the pool floating facedown in the pool, presumably dead. Walking ahead, Sheriff Bell finds Llewelyn dead too from gunshot wounds sustained in the firefight.
Was it ever explained how the cartel got there? What was Anton's role in all this? From the way the lock to Llewelyn's motel room was shot out, it seemed that Anton found him.