[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.
[Updated at 2:09 p.m. ET]
Gorgone is explaining how he makes a DNA profile for a DNA sample.
[Updated at 2:07 p.m. ET]
De La Rionda is now asking Gorgone about the specific DNA testing he did in Zimmerman's case.
[Updated at 2:04 p.m. ET]