talk about because it's still classified. there were three packages. inside the first package was classified documents. some of the pages were photographs that were classified. the second package was the encrypted letter. and the third package was a d decryption code. without that key you could not read the letter. >> the new york field office decoded it with the encryption key. >> it said i am an analyst for the c.i.a. i want to commit espionage. >> so, this someone was likely working out of the washington, d.c. area. >> then that for new york switches the case down to the washington field office. we took the de crypted letter and looked at it for lead purposes. >> what can we know from this decoded letter that we can say about the person who wrote this letter?