Do you think Jose eats a big Nachos Bel Grande right in front of her?
2011.06.22 TRIAL Day Twenty-five (Morning Session)
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Do you think Jose eats a big Nachos Bel Grande right in front of her?
Oh my, has someone hacked into Mr Hornsby tweet? Too funny
Whisperer
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Well, with gasoline and chlorofrom-like cleaners, the decomp was pretty degraded..
wundermommy76
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But isn't it true that he is not a doctor? Why does everyone keep referring to him as a doctor - in news articles/media shows?
What'sThatClue
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I'm lost...I thought witness said he couldn't conclude there was human decomp in the car but now I'm reading from the rest of you that he thinks there was a dead body in the car....I must have got it wrong, so sorry.
Steely Dan
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Why does JB keeping calling witness' that can make Dr. Vass look highly respected, very intelligent and provide nothing for the defense?
Steft50
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Morning! Casey is currently innocent of the charges shes being tried for at the moment, but she is also a convicted felon.
Azcrabcakes
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She had better NOT be eating crabcakes. Nu uh. Squirrelcakes would be perfect!
camcneishg
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open that can and let him smell Dr. Vass's sample......just sayin....
waitin'4thewrld2chg
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I wonder how many witnesses for the defense are secretly glad/relieved when they cannot conclusively make definitive statements that would hurt the state's case.
ami
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#
#cheneymason questions direct, to the point and kept boring science lessons to a minimum. #CaseyAnthony
by bobkealing via twitter at 10:08 AM
**
***what the heck is bobkealing smoking this morning? He is watching a completely diff trial!
#cheneymason questions direct, to the point and kept boring science lessons to a minimum. #CaseyAnthony
by bobkealing via twitter at 10:08 AM
**
***what the heck is bobkealing smoking this morning? He is watching a completely diff trial!
mombomb
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9:36
DIRECT EXAMINATION OF MICHAEL SIGMAN BY CM
He is a faculty member at UCF. He has a PhD in chemistry. Joint appointment for the National Center for Forensic Science. BS in 1982 from SW Missouri State University. PhD in 1986 from FSU. He was an NIH post doctoral fellow at the University of Illinois and the University of Chicago.
He worked for 1 year as a research scientist for Dow Chemical. Staff scientist at Oakridge from 1990 to 2002 and then went to UCF.
He has known Dr. Vass since 1990.
Peer reviewed articles - he has 74 publications and book chapters. He's lectured 140 times.
Witness tendered as expert in Chemistry with no objection by JA
On 7/21/08 he received a call from Eric Walton from UCF police officer asking him to speak to Eric Striker about air samples from the car.
Striker told him he had talked to Dr. Vass and they wanted air samples taken from the trunk. Dr. Vass gave his name.
He then called Dr. Vass to ask what type of samples he wanted and what methodology to use. He knows Dr. Vass uses sorbent traps and said he didn't have any Discussed the use of a Tevlar bag and Dr. Vass said that would be acceptable.
He and his associate pulled a liter of air from the air and then 300 ml and put them in a second one. They did not have a pump, so they used a syringe. Trunk was closed when he arrive - opened it up just enough to extract the sample. He left the samples with OCSO - the larger bag was to go to Dr. Vass and the smaller bag went to UCF National Center for Forensic Science.
The first test they ran - they extracted 250 mcl from the bag and injected it into a GCMS. He then explained how the machine works. It is a widely used and well characterized method for doing chemical analysis.
They analyzed the sample and the results showed that there were trace amounts of volatile organic components, but the signal was not strong and the sample was not concentrated enough to be usable. The components were comparable to gas or other petroleum products.
In the first sample, the sample was too weak. They then took a second sample of 330 mcl using a solid phase micro-extraction fiber. This sample had a better signal. They determined if they wanted a better sample, to use the solid phase technique and the results were again consistent with gasoline.
He did not do any quantitative analysis.
Second sample identified several components of gasoline.
7/30/08 report
On 7/22/08 they returned with a solid phase micro extraction fiber and carbon strip for 40 minutes. They then placed them on ice and returned to the NCFS and analyzed them. The next day they went back to OCSO and left the solid phase and active charcoal filters for 7 hours. These samples had a stronger response showing a primary pattern of gasoline and that there was present in the sample chloroform ( solvent and also formed from the reaction of bleach with organic components in the environment), dimethyl disulfide (present in onions and cabbage and decomp).. and tetrochlorol ethyline (used in dry cleaning or degreaser). A quantitative analysis was not done, but could have been done.
He has not done direct studies on decomp. It is reported by Dr. Vass and Dr. Steferopolis that there are a whole host of compounds released in decomp.
It is his opinion, based on his samples and analysis, the three compounds were present, but gave very low readings, based solely on his data and test he could not conclude that there had been human remains in the trunk.
He understands that there was garbage found in the trunk of the car.
He took a total of 6 air samples - 2 tevlar bags, 40 min solid extraction fiber, 40 min carbon strip, 4 solid base micro extraction fibers.
The solid phase micro extraction fibers (40 min) and two 7 hour exposures contained the three components. They were not found in the tevlar bag.
No further questions.
15 minute recess. (10:09)
DIRECT EXAMINATION OF MICHAEL SIGMAN BY CM
He is a faculty member at UCF. He has a PhD in chemistry. Joint appointment for the National Center for Forensic Science. BS in 1982 from SW Missouri State University. PhD in 1986 from FSU. He was an NIH post doctoral fellow at the University of Illinois and the University of Chicago.
He worked for 1 year as a research scientist for Dow Chemical. Staff scientist at Oakridge from 1990 to 2002 and then went to UCF.
He has known Dr. Vass since 1990.
Peer reviewed articles - he has 74 publications and book chapters. He's lectured 140 times.
Witness tendered as expert in Chemistry with no objection by JA
On 7/21/08 he received a call from Eric Walton from UCF police officer asking him to speak to Eric Striker about air samples from the car.
Striker told him he had talked to Dr. Vass and they wanted air samples taken from the trunk. Dr. Vass gave his name.
He then called Dr. Vass to ask what type of samples he wanted and what methodology to use. He knows Dr. Vass uses sorbent traps and said he didn't have any Discussed the use of a Tevlar bag and Dr. Vass said that would be acceptable.
He and his associate pulled a liter of air from the air and then 300 ml and put them in a second one. They did not have a pump, so they used a syringe. Trunk was closed when he arrive - opened it up just enough to extract the sample. He left the samples with OCSO - the larger bag was to go to Dr. Vass and the smaller bag went to UCF National Center for Forensic Science.
The first test they ran - they extracted 250 mcl from the bag and injected it into a GCMS. He then explained how the machine works. It is a widely used and well characterized method for doing chemical analysis.
They analyzed the sample and the results showed that there were trace amounts of volatile organic components, but the signal was not strong and the sample was not concentrated enough to be usable. The components were comparable to gas or other petroleum products.
In the first sample, the sample was too weak. They then took a second sample of 330 mcl using a solid phase micro-extraction fiber. This sample had a better signal. They determined if they wanted a better sample, to use the solid phase technique and the results were again consistent with gasoline.
He did not do any quantitative analysis.
Second sample identified several components of gasoline.
7/30/08 report
On 7/22/08 they returned with a solid phase micro extraction fiber and carbon strip for 40 minutes. They then placed them on ice and returned to the NCFS and analyzed them. The next day they went back to OCSO and left the solid phase and active charcoal filters for 7 hours. These samples had a stronger response showing a primary pattern of gasoline and that there was present in the sample chloroform ( solvent and also formed from the reaction of bleach with organic components in the environment), dimethyl disulfide (present in onions and cabbage and decomp).. and tetrochlorol ethyline (used in dry cleaning or degreaser). A quantitative analysis was not done, but could have been done.
He has not done direct studies on decomp. It is reported by Dr. Vass and Dr. Steferopolis that there are a whole host of compounds released in decomp.
It is his opinion, based on his samples and analysis, the three compounds were present, but gave very low readings, based solely on his data and test he could not conclude that there had been human remains in the trunk.
He understands that there was garbage found in the trunk of the car.
He took a total of 6 air samples - 2 tevlar bags, 40 min solid extraction fiber, 40 min carbon strip, 4 solid base micro extraction fibers.
The solid phase micro extraction fibers (40 min) and two 7 hour exposures contained the three components. They were not found in the tevlar bag.
No further questions.
15 minute recess. (10:09)
camcneishg
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wonder if he smelled anything????
wenwe4
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CM w/Michael Sigman - (sorry missed his CV)
peer reviewed journal - articles submitted - sent to people in field - peers make reviews and submit to editor - decision to publish or not.....
peer reviewed articles published and over time since received PhD made 140 presentations and in conjunction with students....expert witness in chemistry
Dr. Sigman - first came involved in kc case...on 7/21/08 in lab received a phone call from Eric Walton LE asking to speak to Mr. Striker from OCSO re: take samples of air from car belonging to KC....wanted to take air samples from car...Dr. Vass not available to take samples - Dr. V gave his name to take samples air from trunk..
first called Dr. V asked what type of methodology to use....I didn't have absorbent traps...asked to use a Tevlar bag - he said that would be acceptable....it is made of polymer commonly used to collect air samples.....
Doug Clark an associate who works in lab with me and myself proceeded to OCSO took tevlar bag and gas syringe - pulled 1 sample of 1 liter of air in tevlar bag and then pulled another amount and put in smaller bag
usually have a pump to pull the air....we didn't have pump....but used a gas syringe by opening trunk just enough to get needle in to pull the air....second sample approx. 300 mililiters in tevlar bag....left both samples with OCSO - larger bag sent to Dr. Vass and smaller bag they brought to us the following morning to test
first test ran used a gas syringe - pull 250 microliters of hair used GCMS to examine air....GCMS like an oven - oven component a very long g lass capillary 25-30 meters in length.....micron is 1 millionth of a meter....25 micron film is 25 mm of a meter....inserted generally by a syringe - pass thru column- mixture components will separate out into bands...come out into mass spectrometer the detector for this instrument....eletrons in the source 70 electron volts - pass very close to electron molecules - create positive charge on molecules directed thru mass analyzer - mass of molecule to charge of molecule....molecule have a weight - pieces break into and mass to charge ratio of that we can identify.....widely used chemical analysis...very stable used many times.
we analysed 250 microliter of air pulled in syringe results obtained from GCMS showed trace amounts of volitle organic compounds but signal not strong - sample was useable .....left the big bag with OCSO - not sure if sent to Dr. Vass....test of 250 microliter saw organic components very weakly in soil.....hydrocarbons like in gasoline ....ordinary gasoline yes....find any others? in first sample it was too weak...used a different methodolgy to extract air....very thin glass...with polymer coating ...fiber contained within metal needle...extend fiber from needle and leave for extended time...retract fiber from needle- remove need and put into GCMS insert needle in injection port 250 Degree centigrade- organics go thru polymer and into GCMS....what components extract in 2nd sample very similar to first sample much more concentrated we had a better signal - with solid microextraction...consistent with presence of gasoline....able to do a quantative analysis No, not any.....
what compounds identify? in 2nd sample identify tolulene, ethobenzene, componenets typically in gasoline......in testing determine some amounts of ?choro-ethene?
want to refresh memory look @ report
do not believe in sample 2 = petrochloro=etheline...
got some samples later. returned to OCSO garage - sample from car solid phase and carbon strip...took back to Nat. Center for Forensic Science - placed on ice - looked @ them immediatly after return.
next day picked up samples left in car 7 1/2 hours....analytical result ...analysed same day as well....with those samples better and stronger than saw in tevlar bag...primary pattern was gasoline also determined also chloroform, dimetro ....and tetrochloroethelyn
quantitative analysis was not done...primary was gas then other three.....tetrochlor ethely...used in dryclean and can be used as a degreaser - (object-
what compounds found in air.
gasoline, chloroform, dimethol disulfide and tetrochloroetheline......chlroform solvent in chemical labs and degreasing applications and find in natural settings formed in reaction bleach and organic components....clorox...sodium hypochloride...
dimethal disulfide = occur naturally in substances? yes in onions, cabbage, soil samples, reported in decomp as well...
based on your ed and train...are these sometimes emitted from decomp of human remains...haven't studied human remains...reported by Dr. Vass and Dr. Stephanolopolis...
all 3 are produced in human decomp - listed 30 in his paper but these 3 indicated human decomp....in 2005 Dr. S - reported list of 86 chemicals found from 2 decomp bodies found in Meditteranian sea....of 86 - 11 of 30 were listed by Dr. Vass....didn't list tetro chloro and chlroform....likely produced in anerobic conditions with no air present - based upon the literature...those compounds can be related to human decomp...in addition to cabbage/onions/cleaners and chlorox? yes...my opinion based upon sample we collected and analysed...3 compounds were present but they were @ low responses in instrument - we didn't quantify ....those sources are found in natural ...I could not concluded human remains in the trunk of car....were you aware garbage found in trunk? I do try not to follow details but I do know garbage was found in trunk....
CM - how many air samples take? total of 6 ...2 tevlar bags....th 40 min solid phase micro-extraction....40 min carbon strip.....4 solid phase microextractors -2 @ OCSO , 2 we analyzed and 2 carbon extractors....gasoline was principle GCMS profile could be attributed to gasoline....solid phase micro extraction from 40 min exposure and 7 1/2 hr exposures...contained those chemicals 3....didn't see those samples taken from tevlar bag and last carbon strip we analysed....strip it with carbon disulfide.....also didn't see the 3 compounds ....
air in 2 tevlar bags were done @ same time...
15 min recess
okiedokietoo
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.....continuing with CM and the mass spectrometer.....
Dr.S: reported by Dr. Vass in peer reviewed studies - there are hosts of compounds that are produced during decomp
re:chloroform
*cannot conclusively determine that there had been human remains in the car
* could be attributed to gasoline
*
Dr.S: reported by Dr. Vass in peer reviewed studies - there are hosts of compounds that are produced during decomp
re:chloroform
*cannot conclusively determine that there had been human remains in the car
* could be attributed to gasoline
*
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