[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]
De La Rionda asks Gorgone to tell the jury about the precautions he takes to make sure the DNA samples being tested are not contaminated.
[Updated at 2 p.m. ET]
Gorgone is explaining DNA and how it is used to identify to criminal suspects.
[Updated at 1:58 p.m. ET]
Prosecutor Bernie De La Rionda has called Anthony Gorgone, of the Florida Department of Law Enforcement crime lab, to the stand.
[Updated at 1:55 p.m. ET]
Nelson says she will go as late as necessary to get the state to rest today, and she wants the defense to begin Friday morning. The jury is being seated.
[Updated at 1:53 p.m. ET]
West says the defense team has been tied up with issues and hasn't had time. Nelson seems to be getting frustrated with West.
[Updated at 1:51 p.m. ET]
Nelson says she wants to hold court Friday, because jurors are sequestered away from their families.
[Updated at 1:49 p.m. ET]
Nelson says the prosecution has said it plans to rest today, with the defense starting its case Friday morning.
[Updated at 1:48 p.m. ET]
Judge Debra Nelson is on the stand. Defense attorney Don West is discuss scheduling issues with depositions they want to conduct over the next few days. West has asked for court to be recessed Friday.
[Updated at 1:44 p.m. ET]
Zimmerman has entered the courtroom. Testimony should resume shortly.
[Updated at 12:13 p.m. ET]
The judge has recessed jurors for lunch until 1:45 p.m. ET. She tells them she wants to give them extra time because there's something different for lunch today. The live blog will pick back up once testimony resumes.
[Updated at 12:12 p.m. ET]
Siewert says this gun doesn't shift into single action after you fire it -- each pull has to be the full pull.
[Updated at 12:09 p.m. ET]
Prosecutor Guy has Siewert show jurors what it takes to fire the gun. She aims it at a wall to demonstrate.
[Updated at 12:08 p.m. ET]
Siewert explains how you have to physically engage the safety on the gun if it has one.
[Updated at 12:07 p.m. ET]
Siewert says she only examines clothing, she doesn't look at the wound a victim might have. O'Mara has finished his questions. Prosecutor John Guy asks if the gun could have been used for murder. The defense objects, and the judge sustains.
[Updated at 12:05 p.m. ET]
O'Mara says there was no evidence that the gun was pressed into the sweatshirt. Siewert says it was consistent with the firearm touching the shirt, whether that touch was light or more pressed into the shirt. She says there may potentially have been different evidence if the sweatshirt was wrapped around the gun.
[Updated at 12:01 p.m. ET]
Siewert says again that most law enforcement guns she sees have a bullet in the chamber.
[Updated at 11:59 a.m. ET]
Siewert agrees that most law enforcement carry guns with a bullet in the chamber.
"They're not much use if they're not ready to fire, are they?" asks O'Mara.
"No," says Siewert.