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compared to what i've got planned for you." the the battle over gun control really behind these threats? >> well, that's how it seems. now, it could also be somebody on the other side, you know, trying to make their on the by, you know, blaming the people who believe in gun rights. >> reporter: this latest round of threats has many wondering if ricin is becoming the weapon of choice for intimidation. >> ricin is probably one of the worse ways to try to kill somebody. i don't see it as a real threat in the sense of the actual capability to kill, but rather to intimidate and attract publicity. >> reporter: so the investigation remains focused here on this house you see behind me. neighbors here tell us they saw fbi agents going in and out of the house repeatedly and at one point bringing out electronic equipment. john and christine? >> ed lavendera, that search taking us to new boston, texas, where we find you this morning. >> and also developing this morning, the persistent, dangerous threat of tornado slowly moving to the east. oklahoma up to the great lakes