Based on the book Final Vision: The Last Word On Jeffrey MacDonald by Joe McGinniss, the new Investigation Discovery true-crime movie Final Vision centers around Jeffrey MacDonald, better known as the Green Beret Killer, a man convicted of murdering his pregnant wife and two daughters in 1970. MacDonald, who pleaded not guilty to the crimes, approached McGinniss to tell his story, presumably to prove his innocence. This was not the conclusion McGinniss reached in his book and there are some who speculate that McGinniss didn’t use his access to MacDonald ethically, choosing to tell a sensationalist story instead of trying to find the truth. In the video above, Final Vision stars Scott Foley and Dave Annable discuss whether those claims have any validity.