Is this from the comics?

[Joshua]

Adam was once a human member of the Initiative who met his end at the hands of a demon corpse possessed by the ghost of Mayor Wilkins

http://buffy.wikia.com/wiki/Adam

 

[FaithsFollower]

According that info, I looked up the footnote that goes with it and it's from this comic. 🙂

That sounds really, really interesting. 🙂

 

[Xin Rong]

Interesting, but as the comic isn't canon, it doesn't count as a true origin story for adam... personally I don't like the idea, the mayors storyline ended well enough for me.