On the evening of May 29, 2010, Jeffrey D. McAdam, 46, of Victor, Iowa, was found fatally shot in the men’s restroom at an Interstate 80 rest area. A passing truck driver discovered him and called authorities; emergency responders pronounced him dead at the scene.

Within a day investigators arrested 31-year-old Peter Riggs of Columbus, Nebraska. Riggs was taken into custody in Johnson County, Iowa, and charged with McAdam’s murder. Authorities did not publicly disclose a motive at the time of the arrest.

McAdam was born July 1, 1963, in Marengo, Iowa. He worked as a maintenance worker for LME Cleaning Services at the rest area and had previously been an over-the-road truck driver. He owned Jeff’s Taxidermy, enjoyed hunting and fishing, coached youth sports, and left behind a wife and three children.

Did anyone who traveled I-80 near that rest area or knew McAdam notice anything unusual that night?