season 13

I was watching season 13 episode 15 (Dead of the Class) and David Phillips went to a 15 year high school reunion. If he graduated high school in 1998, how was he an assistant medical examiner in season 1? Was he still in college? Does anyone else have any timeline related questions or answers...

READERS and/or POSTERS: please use this thread (#5), as the current one for all Criminal Minds info, Season 12 and beyond. We have had an altercation, firing, new cast members, and re-hiring of a popular actress to this show. Will you watch without series star Thomas Gibson? Excited about...