Candy gets George and shows him Curleys wife laying dead in the barn
"Now you listen . The guys might think I was in on it .I'm gonna go in the bunk house. Then in a minute you come out and tell the guys about her , and I'll come along like I never seen her. Will you do that?So the guys wont think I was in on it."
"Sure, George . I'll do that."
Candy goes and gets Curly,Slim,Carlson,and Crooks stands in the back out of attention range. They all see the body and know exactly who it is without even thinking.
Then Curly tells Carlson to grab Crook's shotgun and tells George and Slim follow him into the woods to kill Lennie .