Robert Mark Peters, 43, was last seen in the pre-dawn hours of Sunday, June 28, 2009, at the Hidden Valley Campground in Greenville, Wayne County, Missouri. He was camping with two friends and planned to meet his wife and two daughters later that day. A fellow camper reported a man matching his description approaching around 4:30 a.m., appearing disoriented and asking for directions twice within about twenty minutes. By 8 a.m. his friends woke to find he was gone; his pickup truck and duffel bag remained at the campsite.

An extensive search followed, involving local and state agencies and volunteer crews. Despite hundreds of search hours, no trace of Robert was located. Family members say he was insulin-dependent, had received a new insulin pump days earlier that held only a few days of medication, and could become confused or disoriented when his insulin dropped. He had been struggling with depression and had a prior right-ankle injury that may have caused a limp. At disappearance he wore a light blue t-shirt, beige shorts, sandals, and glasses.

Does anyone who camped at Hidden Valley Campground in late June 2009 or who knew Robert have information that could help explain what happened that morning?