Early tests show deadly ricin in Senate mailroom

This is the hillbilly WMD. Castor beans are plentiful down south and a high school student could weaponize ricin. Stuffing in an envelope is not a good delivery system even if you have achieved a very fine particle size. You need a particle the size of a pinhead to get inside the lungs, it can also be mixed in food or injected. This information is available in numerous places, wha.., who's that at my door?