DATELINE a husband is charged with killing his wife in MYSTERY AT HEATH BAR FARM

I watched this & it is an update from a few years ago. A husband is convicted of murdering his wife until several witnesses come forward saying that they didn't see the husband near the home at the time his wife is gunned down. The husband gets a new trial & the verdict surprises you. I don't think he did it, but who did if he didn't kill the wife? 

Click on the photo for TV recap of MYSTERY AT HEATH BAR FARM.