to call for help. the county sheriff advised caution. >> right now this is an unsolved homicide. whether it's somebody local or somebody from another town, we don't know at this time. >> reporter: who could have murdered wayne and sharmon stock? and why? just a couple of hours after wayne and sharmon stock's son discovered their bodies in their rural nebraska farmhouse on easter monday 2006, the word got around. law enforcement swarmed the scene, neighbors expressed shock in that understated midwestern way. >> they're just typical nebraska farm background people, and you wouldn't expect it. >> reporter: andy stock, as you can see in these pictures taken on that very day, stood next to his pickup in utter shock waiting for his brother and sister to arrive. and he struggled to process it all. as his father's words echoed in his mind. >> i'll never forget july of '05.