Overview

• Michael Royce Sparks, 62, has been charged with the murder of Daniel and Stephanie Menard.
• The couple was last seen on August 24 at their home in Olive Dell Ranch, a family-friendly nudist resort.
• Authorities discovered human remains in a concrete bunker beneath Sparks' home.
• The Menards' unlocked vehicle was found with their personal belongings still inside.
• The couple's dog, Cuddles, is also missing.