Buried in the Backyard: Where Is Paul Gruber? (Season 2, Episode 6)

In 1994, Paul Gruber goes missing from his home in Muskrat Lake, Idaho. His daughter, Shellie Gruber Kepley, grows worried when she does not hear from her father on Valentine's Day or her son's birthday. Shellie's 3-year-old then calls Paul and leaves a message, but they never hear back. A week later, Shellie receives a birthday card for her son from her father, but the handwriting does not match Paul's script.