Mas cositas: http://www.law.umkc.edu/faculty/projects...imony.html
Quote:Q. How many studies have you conducted?A. I've conducted a number of studies.Q. When was the last one?A. In May of 1995, I believe.Q. What was that study? What were you doing?A. I was trying to determine if there were organicexplosives -- particular types of organic explosives in thelaboratory in various places that I felt at the time wereimportant to the handling of explosive residues evidence.Q. Did you complete the study?A. Yes.Q. What were your results?A. We found -- I think we took 50 swabs. I'd have to look atthe study myself, but we found that there were some places thathad -- there were four or five, maybe -- yes, that had someorganic explosives.Q. Where were those places? Do you recall?A. The best I can recall now is they were in areas of theExplosives Unit's evidence-handling area and evidence-storagearea.
Quote:Q. Can explosives residue travel around?A. It can and does.Q. And have you ever conducted any studies wherein youdetermined that explosive residues had traveled around andcontaminated other items?A. The FBI has.Q. Have you participated in those?A. Yes, I have. I have looked -- THE COURT: I don't know what you mean by "traveledaround." That doesn't sound very scientific. MR. TRITICO: It probably wasn't, your Honor.BY MR. TRITICO:Q. Can it move around in the air?A. Yes.Q. Some explosives residues?A. Yes, I'm aware that some can move around in the air.Q. Can explosives residues be transferred by people like on myhands or clothes or shoes?A. Yes, it can.
Quote:Q. Can explosives residue travel from box to box?A. There are explosive residues that have high vapor pressure,like nitroglycerine and ethylene glycol dinitrate that can.Q. What does high vapor pressure mean?A. The material evaporates. Just molecules of nitroglycerine,for instance, evaporate, travel through objects over a periodof time.Q. How about explosives residue traveling from item to itemwithin a box?A. If you're dealing with, again, explosives residue that havehigh vapor pressures.Q. Did you ever conduct a study wherein you used blue jeans?A. Yes, I did..Y ahora la guinda
Quote:Q. What was the purpose of this study?A. Initially what we were trying to do was find out how longethylene glycol dinitrate would last on blue jeans. So it wasgoing to be a multiyear study.Q. Is that EGDN?A. Yes, EGDN.Q. Okay.A. Excuse me.Q. So what did you do?A. We carried, I believe, eight pairs of blue jeans down tothe Quantico bomb range and put some aside, blew up anexplosive that didn't have any EGDN in it near them and putsome others that were hanging up on like a clothesline thereand blew up explosives that had EGDN up close to the others.And we tested them to see if EGDN was on them. Then we placedthem in plastic bags. We put them all together in a box,cardboard box. We stored the box over a period of time andfound that EGDN was on the original blue jeans that had EGDN onthem, but it was also on the blue jeans that didn't have theEGDN on them to start out with.