David Karl Heitman, a 42-year-old Marine Corps veteran, was last seen on April 19, 2016, in Columbia, Missouri. His last known contact was with a social worker, during which he mentioned plans to visit a lake with a friend. Over two months later, when the social worker visited his home in early June, it was found empty. Authorities began searching for him, and in October 2016, a hunter discovered a duffle bag containing Heitman’s clothing and identifying documents in the Mark Twain National Fo
...Read MoreLast Seen: Apr 19, 2016