Yesterday, upstate news station News 10 in Syracuse that it received a package from Binghamton massacre gunman Jiverly Wong containing a rambling letter (it begins with "I am Jiverly Wong shooting the people"), his driver's license, and photos of himself posing with guns. The Daily News describes Wong's writing as a "litany of paranoid complaints" including claims that police were monitoring him, "touched him while he slept" and stole his wallet. Wong killed himself after fatally shooting 13 and wounding many others. NYU assistant professor of psychiatry Dr. Vatsal Thakkar tells the Post, "The letter sounds bizarre and has tones of persecution. And in his internal world, this violence might have been some sort of retaliation. Put these actions and the theme of the letter all together, and it could point to major mental illness, quite possibly paranoid schizophrenia." Why Wong decided to kill fellow immigrants who were learning English and staff at the American Civic Association is unclear, but the police are checking the Internet as well as victims' biographies to see if there are any further clues.