Forensics Gave Investigators Little to Work With.

The article presents information on the physical evidence in the anthrax case in the U.S. which are four hand-addressed envelopes, four letters and a small amount of anthrax itself. Accordingly, the envelopes that were used were the prestamped kind available at post offices nationwide and the letters were photocopies, not originals. Also, no fingerprints or human DNA were found on the envelopes or letters.