On March 3rd, 2004 pro-snowboarder Joshua Korvin disappeared on the same day a small accidental fire was discovered at his Mount Vernon, Washington home. We cover the bizarre circumstances around his disappearance, whether the fire had anything to do with his disappearance, his involvement in bringing snowboarding to Washington's youth, and our own theories on the case. 

Sources: 

Charley Project - Joshua Korvin

King5 News - New clues sought in case of missing pro snowboarder

Boardistan, snowboarding forum thread - Washington Snowboarder Missing For 7 Years

The article about the crash I was unsure if related to the case or not:

The Seattle Times - Anacortes Woman, 19, dies in head on crash