Envelope addressed to Trump tested positive for ricin, officials say

[ProfessorGAC]

9. I Don't Believe This

As the article says, and GREATLY understates, weaponizing ricin is a detailed process requiring very specialized equipment.
Failure to properly purify leaves a highly distinctive odor, that the PO dogs would smell form 15' away, at least.
The once purified, the crystalization required to make a very fine aerosol is expensive.
Anybody with the skills to do all that would have the ability to make something more dangerous than ricin.