What does mr.hale story reveal?

Inside the house, the Sheriff and the gallantly, cocky, young attorney ask Hale to recount what happened when he came by the other day. Hale nervously explains that he and his eldest son were driving a load of potatoes to town and stopped by the Wright home to see if they’d like to have a telephone put in. Inside, Hale found only Minnie, who was behaving very strangely. When he said he wanted to see John, she said he was dead. Hale and his son went upstairs to see John, strangled by a rope around the neck. Minnie simply said she was sleeping when it happened and heard nothing.