Christopher Burton Phillips was charged after police found a variety of containers of unstable chemicals at a cottage near Halifax.
Phillips arrested the 42-year-old in a Ottawa hotel a week ago.
At the time, two areas in Halifax were under evacuation orders over concerns about the chemicals.
Phillip appeared in court last Friday in Halifax. He’s charged with uttering threats and possession of a weapon for a dangerous purpose.
Dangerous weapon charge
Police said the dangerous weapon charge against Phillips relates to the chemical osmium tetroxide.
The Crown attorney in the case has asked for a psychiatric assessment.
Court documents from the U.S. suggest Phillips has a history of addiction and mental illness.
According to documents filed in Washington state, Phillips served in the navy during the 1990s. While serving in 1992 he injured his feet and required several surgeries. The documents say Phillips was receiving monthly veterans disability benefits of $3,750.
Phillips is an American-trained doctor, with degrees from Oklahoma and Boston. He practised as an ophthalmologist and owned an eye-care clinic in Washington state starting in 2007. Complaints were brought against Phillips by at least five patients.
As of 2010, Phillips was no longer licensed to practice medicine in Washington.