Not that I recall. It's more that the criminal was supposed to use a key to enter the house and kill the woman when she answered the phone (which the husband would be calling to) but she fights him off and kills him instead. The husband succeeds in making it look like she killed the criminal for blackmailing her about her affair and she gets condemned to death but then a police officer suspects this isn't right and catches the husband on a lie about who has access and knowledge of spare keys to the house where.the murder occurred.