He stressed that authorities were still waiting for confirmation that the packages contained
ricin. Pentagon police referred the matter to the FBI for investigation.
Initial tests were positive for
Ricin but the FBI is now analysing it further to make final determinations.
RiVax is a
ricin toxin vaccine, under development by Soligenix, and originally invented at the University of Texas Southwestern.
Investigators seized 3,150 grains of
ricin -- all ordered via the Internet -- during a search of the suspect's home in Cologne in June, along with 84.3 mg of prepared
ricin.
In 1978,
ricin was used in the assassination of the Bulgarian dissident and journalist Georgi Markov.
In his defence, Ali insisted there was "no harmful purpose" behind what he claimed was just an experiment to see if he could get his hands on
ricin.
The judge commended law enforcement agencies in Britain and the United States for ensuring that
ricin - know as the perfect poison for leaving no trace - did not get into Ali's possession.
Computer analysis showed that Ali first began trawling the internet for information on poisons such as abrin,
ricin and cyanide in October last year.
Ali first approached the undercover agent by private message in January, asking to buy
ricin, before paying him using online currency Bitcoin on February 4.
The judge commended law enforcement agencies in Britain and the US for ensuring that
ricin - known as the perfect poison for leaving no trace - did not get into Ali's possession.
In his defence, Ali told jurors that he was just "curious" and wanted to test the boundaries of the Dark Web, unaware that
ricin was illegal.