Kathy T. Nguyen, a Vietnamese woman, 61, died on October 31, 2001, in Manhattan after arriving at Lenox Hill Hospital in sudden respiratory distress that at first looked like a bad case of pneumonia or heart failure. In the days before she came in, she had been feeling progressively weaker, her chest heavy, her muscles aching; she was short of breath and coughing, and by the time she reached intensive care she was in respiratory failure and had to be intubated before investigators could get
more than fragments of her own story. Blood cultures soon revealed long chains of gram-positive rods, and testing rapidly confirmed Bacillus anthracis—an inhalational anthrax infection that would become New York City’s only fatal case in the 2001 outbreak.
Once the diagnosis landed, her life became a map on a wall and a question that wouldn’t stop echoing: where had the spores come from? Nguyen worked in a stockroom in the basement of Manhattan Eye, Ear and Throat Hospital, and her ordinary routines—work shifts, errands, church, the subway—were treated like the only breadcrumbs leading back to whoever had sent poison through the mail. Teams drawn from public health and law enforcement interviewed co-workers, neighbors, acquaintances, and her mail carrier; they searched her apartment, examined personal effects, and dug through phone and financial records. They visited multiple post offices connected to where she lived and worked, and they even displayed her photograph in churches she reportedly attended and in Chinatown, where she was said to shop, hoping someone would remember a small detail that mattered.
But the deeper investigators went, the more the case seemed to dissolve in their hands. Sampling and surveillance stretched outward in widening circles: nasal swabs from nearby co-workers, repeated environmental sampling at her workplace—especially around mail bins, the mailroom, and the stockrooms—plus sampling in and around her home, from selected personal belongings, from mail-processing facilities and post offices that served her neighborhoods, and from subway stations chosen using data from the transit card issued in her name. People who had spent substantial time near her at work were interviewed and offered antibiotic prophylaxis while officials waited to see whether the hospital itself had been the exposure site. Yet again and again, cultures and environmental tests came back negative, no additional cases were found, and the route of exposure remained officially unknown. The absence of traces—nothing in her home, nothing at work, nothing obvious in her mail—left behind a chilling possibility that she had encountered contaminated mail only indirectly, or had crossed paths, briefly and unknowingly, with the chain of events driving the broader attack.
In the larger Amerithrax investigation, there was no arrest made specifically for Nguyen’s death. Years later, federal officials concluded that the anthrax used in the 2001 mailings was linked to material associated with U.S. Army biodefense research, and the Department of Justice said prosecutors were preparing to seek an indictment charging Dr. Bruce E. Ivins with offenses including use of a weapon of mass destruction, but he died by suicide in July 2008 before charges were filed. The FBI and Justice Department formally closed the investigation in 2010 and released an investigative summary describing the evidence they said supported their conclusion; that conclusion has been publicly disputed by some scientists and others, and another early suspect, Steven Hatfill, was later exonerated.
