We're Alive REP-ivia!!!

[Osiris]

Question: (This is an earlier question that has been re-phrased) What is the likely reason that Burt has the call sign, Raven?

Try to guess without the hint.
Hint

SPOILER 

You are gonna need a little knowledge of American Literature for this one

An alternate answer to the "obvious one." http://www.zombiepodcast.com/forum/s...ll=1#post55573