John Shelton is a decorated military commander. His son is Rudyard Shelton.
When his son was young, John Shelton flew a small plane across the Baltic Sea with his wife and child. A tropical storm hit the craft, but he successfully completed the flight. However, the incident caused his son to develop a fear of flying. (Disruptive Selection)
John Shelton had died before the events of March 2009. ('Card of Ten) His wife was still alive as of October 2009, and mention of Shelton having a stepbrother implies she remarried. (Pavlov's Checkmate)