[Updated at 3:13 p.m. ET]
One stain on the gray sweatshirt did not yield any results of foreign DNA, but Gorgone could not exclude the possibility that Zimmerman's DNA was in that stain.
[Updated at 3:08 p.m. ET]
Gorgone said one stain on Martin's gray sweatshirt contained Zimmerman's DNA. Another stain tested positive for Martin's DNA, and yet another had a mixture of both Martin's and Zimmmerman's DNA.
[Updated at 3:03 p.m. ET]
De La Rionda has now moved on to testing Gorgone did on the sweatshirt Martin was wearing under his hooded jacket.
Updated at 3 p.m. ET]
Gorgone said he did not find anyone else's DNA on Martin's hooded jacket.
[Updated at 2:58 p.m. ET]
One stain on Martin's hoodie did test positive for his DNA.
[Updated at 2:55 p.m. ET]
De La Rionda is asking Gorgone to point to the stains he tested from Martin's clothing.
[Updated at 2:52 p.m. ET]
Gorgone found Martin's DNA on the Skittles bag he bought from the store moments before being shot.
[Updated at 2:48 p.m. ET]
Scrapings from Martin's fingernails did not show the presence of Zimmerman's DNA.
[Updated at 2:46 p.m. ET]
Gorgone did match DNA found on the holster for his gun to Zimmerman. He was able to exclude Martin's DNA as being on his holster.
[Updated at 2:44 p.m. ET]
There was no testable DNA found on the slide of Zimmerman's gun.
[Updated at 2:41 p.m. ET]
Gorgone was unable to find any testable DNA off the trigger of Zimmerman's gun.
[Updated at 2:38 p.m. ET]
A chart shows the DNA testing results from DNA found on handle or grip of Zimmerman's gun. The DNA from the gun matched George Zimmerman's DNA profile. Martin's DNA was not present on the DNA mixture that was found on the grip of the gun.
[Updated at 2:33 p.m. ET]
De La Rionda is now asking Gorgone about DNA samples swabbed from Zimmerman's gun.
[Updated at 2:30 p.m. ET]
De La Rionda is displaying results of the DNA testing in Zimmerman's case. Gorgone is explaining what the data mean.
[Updated at 2:27 p.m. ET]
De La Rionda is showing Gorgone the DNA samples he tested in this case.
[Updated at 2:24 p.m. ET]
De La Rionda has now moved on Gorgone work in Zimmerman's case.
[Updated at 2:21 p.m. ET]
Gorgone is explaining the probability that another person in the population would match the DNA in a sample from a crime scene.
[Updated at 2:17 p.m. ET]
Gorgone says that if he has a mixture of DNA from multiple people, he can determine whose DNA is in the mixture.
[Updated at 2:14 p.m. ET]
De La Rionda asks Gorgone how a DNA sample from a crime scene is compared with a DNA sample taken from a suspect.
[Updated at 2:11 p.m. ET]
Gorgone is now talking about how a DNA sample can be taken by swabbing a surface, like a gun or a table.