Re: is all hope lost?
The employer doesn't care, so move on.
Focus on the wife. Go by his house to and talk to her directly. Make copies of whatever evidence you have and bring it along w/ you. Also give her your email address, phone number(s), and whatever else (FB info, etc) in case she wants to reach out to you later.
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Virginia: "Why can't you kids leave well enough alone? Everything was fine until you started digging around."
Burt: "You sound like a Scooby Doo villain."