in the beginning Mr. Mayherne was talking to Mr.vole and asking about if there was anyone that could clear his name and where he was. Mr. vole said yes and said his devoted wife can tell them that he was there at home before the person had killed Ms.Frnch. as he said his wife was devoted Mr. Mayherne knew that,that information would not sound good in court. He still gave it a shot to go and interveiw her.
Then Mr. Mayherne went to go and talk to Christine asking what happened that night and went Mr.Vole or her husband had gotten home then he mentioned that Mr.Vole said she was devoted thats when she looked at him and said that what if she lied and said he came home at 10:20 and not 9:20, what if she said he came home with blood all over his clothes and pushed her to lie and help hide the body.
As Mr. Mayherne was leaving he had found a letter left for him. they told him to go to an address to get more dirt for Mrs.Vole because of what she had said. he didn't know if this was a set up but he still went.