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Have confirmed there are some similarities between two letters, the letter that was sent to the senate, also, the letter sent to the white house. jonathan dienst is standing by right here. results again may be available by late today at the earliest, we understand. >> that's right. they discovered these letters yes and the official lab tests take about 24 hours for that kind of test to be done, but preliminary field testing on both the letters to senator wicker's office and to the white house, both intercepted at off site facilities, have preliminary field tests of positive and appear to be se...

The reactions in all three of those places -- now, this is my hometown. the reaction is the same because human beings are the same. we take care of each other after things like this. >> michael, in this sort of state of heightened alert we've also seen today a bomb scare at the federal courthouse in boston as well as a ricin letter sent to the white house. we do seem to see these kinds of things after a major incident. why is that? what is it that encouraging people to sort of do these things. >> it's the old adage. when it rains it pours. it makes it very hard for investigators, i would note....

Wait for the test results to come in before they go out and decide whether an arrest is to be made in that case, in that instance. >> senator claire mississippi castle who believes he is not is sending mail to elected fibls officials she said earlier today but in senator wicker's case wasn't it tested twice and confirmed? >> you may have more because i con distracted on the boston piece. i had field tests showed that yes it was the substance and that we were still awaiting the final lab test results. but again, if it came in in the last hour, i was distracted with the boston arrest. and we are...

Where it's tested for all kinds of things. the envelope was found, pulled out of the mail supply and a field test was done. it was also positive, but these tests i must say, are oftentimes wrong. we've had field tests on mail at the capitol that have tested positive for ricin. i remember one at a mail sorting machine that testing positive and it was paper dust from the mail machine. they take the material, they send it to a lab where it's cultured and then they'll see if there is actually ricin and if there is, then it's a pretty serious matter. there's no, no one is suggesting anything connec...

some questions. this -- just a second -- i want to reemphasize what the chief said yesterday. this case will be tried inside a court. okay? so i have to be very careful with my responses. i do not want to jeopardize a future prosecution. [ question inaudible ] >> so again i'm not going to elaborate on this. we have done some field tests but we are sending that evidence back to the fbi lab at quantico. they will make the definitive conclusion as to what those substances are. >> can you talk about your personal experience with this? >> i'm sorry. say again sir? [ question inaudible ] >...