evidence: Around 40% of the victims have yet to be identified, according to the New York City Office of Chief Medical Examiner (OCME). That’s about 1,103 people. In January, OCME identified the 1,650th victim using advanced DNA analysis – John Ballantine Niven, 44, of Oyster Bay, New York, was a senior vice president at Aon Risk Services The effort to identify World Trade Center victims is the "largest and most complex forensic investigation in the history of the United States," OCME reports.