Lennie kills the puppy that was given to him by Slim while tending it. Scared he will get in trouble with George, Lennie attempts to hide the dead puppy.Remembering that if he gets in trouble he won't get to tend the rabbits.
Curley's wife comes in as Lennie is hiding the puppy.She starts talking to him and she let him touch her soft hair. He is petting her head he starts to get a little rough when petting. She stars telling him to don'r mess her hair up and to stop, he doesn't.
She starts screaming and Lennie afraid he will get in trouble starts shaking her so hard that her neck breaks. Candy comes and finds them with Curley's wife dead and Lennie in hysterics.
Candy goes to tell George what has happened. They make a plan and then Candy tells the others what has happened. Curley and the other get ready to track Lennie down and kill him.
Lennie was given instructions by George that if he ever got in trouble he would hide in the bushes near the river. He runs knowing that George will find him soon enough.
George finds Lennie and shoots him before Curley and the others find him and kill him. George is hurt and sad that he had to kill his bestfriend but he knew he had to do it.