Last week, authorities intercepted an envelope that contained ricin.
The letter was reportedly addressed to President Trump.
According to reports at the time, the letter had been mailed from Canada, and now authorities have a suspect in custody.
Caught in Canada
According to the reports, the suspect was arrested trying to re-enter the country from Canada.
While not confirmed, it appears as though the suspect had gone to Canada to mail out the letter, then attempted to return to the United States.
Reports have also surfaced that the suspect mailed several other letters out, although the targeted recipients of those letters have not yet been revealed.
You can read more about this report on Breaking911.