Page 337 - Dna Testing News Today

>> do you agree? >> well, i disagree that there would ever be a judgment of acquittal in a case like this. >> no acquittal? >> no, no, no. that wont happen. you might see the state ask for the lesser included charge. we dont know that they will. but thats a possibility. and theres certainly enough evidence to support it, which is the standard. the court can give a lesser included charge if there is evidence to support it. >> lets talk about this gun. you heard that the crime lab analyst talking....

Police officers who touched the gun as well. it is a wash. and brians point that he is making. zimmerman said trayvon grabbed for the gun and the prosecution would argue his dna would have been on the gun. the way they stored the evidence and dna evidence admitted that the dna could be ruined and he admitted that dna is not always transferred when someone touches something. it is a wash. >> all of that did happen, go a head, brian. >> what is important to notice, the defense has to bring on a fo...

Segments. they dont actually code for any physical characteristic or any kind of molecule inside your body thats doing a job. they are just repetitive, noncoding regions of dna. and i can take advantage of that fact. the fact that those repetitive sequences vary from individual to individual. so i can use these short segments of dna to develop a profile for that individual. >> and if you could id like you to break down in terms of the str process, are there, i think, three or four steps that you...

Found in almost every cell of your body. therefore, it can be left behind in bodily fluids that you leave behind such as blood, semen, saliva, almost sometimes hair and skin cells as well. and forensically, i could use those bodily fluids to develop what i call a dna profile. which would be to analyze the dna at certain locations on the dna molecule, develop a dna profile that could be used for identification purposes and comparison. >> are there other uses for this technology other than a foren...

Analyze something in terms of putting your initials or some kind of markings to be able to say, like, you will have to here in court and say, yeah, i know i examined this item? >> yes. i mark the package that i -- before i open the package, i mark that package with my initials, the florida department of law enforcement case number exhibit, and the date that im examining that item. then the actual item itself, unless theres a reason -- >> lets now move on to the dna testing you did in this specif...

So that every person working in the lab is on the same page and one person isnt doing one thing their way and another person doing another thing their way. so we have written protocols and all of our quality assurance program is in writing. >> and are there any controls within the testing themselves in terms of positive and negative controls to verify that what youre doing is accurate in terms of not getting any misidentification or contamination? >> yes. there are positive and negative controls...

>> i know what your process was. you just swabbed it from the elbow down to the cuff, not having seen any blood, correct? >> correct. i first used the filter paper to rub it and test that for the possible presence ef of blood. that was negative on both sleeves. so i performed swabbing, dna testing and there was no dna foreign to trayvon martin on either of those. >> if its not blood and youre pretty sure its not blood, are you looking for skin cells or other source of dna perhaps the. >> yes any...

>> and we are going to get the photographs and we will also -- let me turn this around. did you examine the whole thing? >> yes. >> now this cutting, did you have anything to do with this cutting there? >> no, that was in tact when i examined the item. >> there appears to be on the backside of the item some writing here and some i would refer to them as holes. but can you explain that, sir? >> that would be my stain c that i examined and those are the cuttings that i took to perform the dna test...

>> it can be left behind in bodily fluids you leave behind such as blood, semen, saliva and bodily fluids i call a dna profile to analyze the dna at certain locations on a dna molecule and develop the dna profile to be used for comparison purposes and comparison. >> are there other uses for this other than forensic or criminal setting? >> yes. several fields use the same dna testing that i use. its used in medical and genetic research. its used in organ and blood transplant, donor recipient eval...

Foul odor when he opened the bag ta unfortunately it was placed in a plastic bag instead of a paper bag. that means the biological evidence risked degradation. that was his term. the analogy was given if any of us has a gym bag with wet clothes and we leave it in the car too long and open it a week later and theres that very strong smell, thats the smell that came from the sweatshirt. let me back up to explain what happened on the direct examination of this expert. so the direct examination of t...