I doubt a copy of a forwarded e-mail qualifies as a stolen good. The AP has nothing in its possession that is stolen- they just received data over the internet. I doubt the government would want to push forward with any type of charges here, given the 1st Amendment implications.
If the "copy of a forwarded email" was obtained through illegal hacking into an email account, then it most definitely is a stolen good.
See post #34. If you know it was unlawfully intercepted, forwarding it is a felony, one count for each person you forward it to, by the way, so be careful on that reply to my 10,000 subscriber list.