Why is TJ accused of stealing? What quotes?

RW and Melvin Simms pretend to be friends with TJ, who steals things for them, and for whom they buy things. When he helps them break into the Barnett Mercantile to steal a gun, they kill Mr. Barnett and injure Mrs. Barnett. Afterward, they beat TJ and lead the mob that breaks into the Avery house and tries to hang him.