[Updated at 4:18 p.m. ET]
West is now asking Gorgone about the DNA samples from the scrapings from Martin's fingernails.
[Updated at 4:14 p.m. ET]
Gorgone said he could not exclude or include Martin's DNA from being on the holster for Zimmerman's gun.
[Updated at 4:13 p.m. ET]
West is asking Gorgone about the DNA test results from the slide on Zimmerman's gun. Gorgone said he was unable to exclude Zimmerman's and Martin's DNA from being present on the gun slide. West made the point that environmental factors like rain could have affected the DNA quality on the slide.
[Updated at 4:10 p.m. ET]
Gorgone said environmental factors like moisture and heat and degrade DNA samples.
[Updated at 4:08 p.m. ET]
West is asking Gorgone about his role in collecting DNA evidence. He said he does not collect DNA samples from the crime scene; that is left to someone else.
[Updated at 4:05 p.m. ET]
Defense attorney Don West is about to cross examine Gorgone.
[Updated at 4:04 p.m. ET]
Judge Nelson is on the bench, and the jury is being seated.
[Updated at 3:40 p.m. ET]
De La Rionda has finished his direct examination of Gorgone. Judge Nelson has recessed court for 15 minutes.
[Updated at 3:38 p.m. ET]
Multiple stains on Zimmerman's shirt matched Zimmerman's DNA. None of the stains on the shirt have matched Martin's DNA.
[Updated at 3:35 p.m. ET]
De La Rionda has now moved on to Gorgone's DNA testing results from Zimmerman's shirt he was wearing the night of the shooting.
[Updated at 3:28 p.m. ET]
Multiple stains on Zimmerman's jacket tested positive for Zimmerman's DNA. At least two stains from Zimmerman's jacket, tested positive for a mixture of DNA that included Martin's DNA.
[Updated at 3:25 p.m. ET]
Gorgone said a stain found on the back right shoulder of the jacket had a mixture of DNA. The major contributor to the mixture of the stain was Zimmerman, but the lesser contributor to that stain could not be determined. However, it is possible Martin contributed to that mixture.
[Updated at 3:22 p.m. ET]