Thursday's hearing began on a bad note for George Zimmerman's defense. The last hearing wasn't a positive one for Zimmerman either, because Judge Debra Nelson denied several key motions filed by the defense.
Read more: HLN's live blog of Zimmerman's last hearing
Nelson denied the defense's motion requesting the court to protect the identities of three witnesses.
"They're concerned they could be subject to ridicule or retribution," said defense lead attorney Mark O'Mara, trying to defend his motion. "They are very concerned, and may have to move out of their residence."
Zimmerman is charged with second-degree murder for fatally shooting Trayvon Martin on Feb. 26, 2012. He says he shot the teenager in self-defense. Jury selection for Zimmerman’s trial is scheduled to begin Monday.
The hearing may be Zimmerman’s attorneys' last chance before trial to argue several critical issues that could determine his fate, including whether prosecutors broke the law.
Nelson also stopped the defense in their tracks as they tried to argue that prosecutor Bernie De La Rionda violated the rules of discovery by not turning over to the defense evidence from Trayvon Martin's phone.
Nelson announced to the court that the discovery would be addressed after the trial, and demanded the attorneys move on to the issue of whether the technology used to analyze the voices on the 911 calls from the night of the shooting will be admissible.
The technology may be key to the prosecution’s case because their experts’ testimony may be able to shed light on what was said between Zimmerman and Martin moments before the teenager was shot.
The law states that for technology to be admissible, it must be “generally accepted” in that particular field. Court documents indicate Zimmerman’s attorneys will likely argue that the voice analysis technology does not meet the threshold of “generally accepted.”
It is not clear if, during Thursday's hearing, the court will tackle the defense’s motion requesting that prosecutors be prohibited from calling Zimmerman a "racist."
Court will pick back up Friday at 9 a.m. ET with the voice identification technology issue.
_ HLN is live-blogging Zimmerman's hearing Thursday. _ Click here to read HLN's live blog of the last Zimmerman hearing. Read below for minute-by-minute updates:
4:47 p.m. ET: Mantei said someone may have a different opinion about the capabilities of the voice identification technology. Nakasone agreed with Mantei saying he had a problem with the opinion, but not the technology. Judge Nelson has recessed court until Friday at 9:00 a.m. ET.
4:42 p.m. ET: Nakasone does not believe any technology available today that could reliably identify the screams on the 911 call. He called it "disturbing" to think some thinks it is possible to identify those screams. He said it would be a breakthrough in the field.
4:39 p.m. ET: Nakasone is explaining how someone can train their ear to identify voices.
4:36 p.m. ET: Mantei has finished his questions for Nakasone, and now West is asking him follow up questions.
4:34 p.m. ET: Nakasone is explaining how voice identification technology can compare voices and eliminate voices during the analysis.
4:29 p.m. ET: Mantei is asking Nakasone about how the scientific group he works with is trying to come up with standard guidelines for using voice identification technology.
4:25 p.m. ET: West has completed his questions for Nakasone, and now prosecutor Rich Mantei is asking him questions now.
4:22 p.m. ET:"A screaming voice is too far for us to address," said Nakasone. "It might mislead in the worst case."
Nakasone said he was only able to determine that the person screaming in the background of the 911 call "was under tremendous duress, " that "the screaming was not normal human speech"and that the person was "someone facing imminent death."
4:19 p.m. ET: Nakasone said the screaming on the recording is almost impossible to analyze, because the voice changes dramatically under stress.
4:16 p.m. ET: On the recording, the caller can be heard calling 911 reporting an altercation. Someone can be heard in the background. Zimmerman looked down at his chest as the audio was being played.
4:12 p.m. ET: The defense is trying to play the audio recording of the 911 call.
4:09 p.m. ET: West is now asking Nakasone about the analysis his office conducted in Zimmerman's case. He is now going to play the recording that is at the center of this hearing.
4:05 p.m. ET: West is asking about some of the guidelines Nakasona believes need to be followed to have a valid recording to determine have an accurate identification. Nakasone said the voice sample being analyzed needs to be 16 seconds long.
4:01 p.m. ET: Nakasone said voice identification should only be used for an investigative tool now, and in a couple years it may be able to be used in courts.
3:51 p.m. ET: Nakasone is explaining how speech recognition technology used in phone systems differ from voice identification technology.
3:47 p.m. ET: West is having Nakasone walk throught the history of different methods of voice recognition.
3:42 p.m. ET: Nakasone is talking about how the other methods of voice recognition works.
3:35 p.m. ET: Nakasona is talking about how voice analysis technology identifies voices, and how it discerns voices from background noise.
3:30 p.m. ET: West is asking if there's different technologies used by the scientific community to conduct voice analysis. Nakasone said there's several different technologies used for voice identification.
3:26 p.m. ET: West is asking Nakasone about the process of conducting forensic voice analysis identification for the FBI.
3:22 p.m. ET: Nakasone said he is involved with forensic voice analysis identification for the FBI.
3:20 p.m. ET: West is now asking Nakasone about his work at the FBI. He is a senior level scientist to the FBI.
3:17 p.m. ET: Nakasone is talking about the development about the voice analysis technology, and how it has become more reliable over time with new technologies.
3:13 p.m. ET: West is asking Nakasone about the group coming up with the guidelines for using this technology.
3:09 p.m. ET: Nakasone said scientists in the field generally accept voice recognition technology as being reasonably reliable. However, he says there needs to be established guidelines or standards for this technology to be used in a courtroom. Nakasone is working with a group of scientists to make those guidelines.
3:06 p.m. ET: Nakasone is walking through his education, work experience and what publications have published his articles.
3:03 p.m. ET: Doctor Hirotaka Nakasone, an audio engineer for the FBI, is answering questions from defense attorney Don West.
2:56 p.m. ET: The judge is back on the bench, and she is discussing with attorneys about calling a witness out of order.
2:25 p.m. ET: O'Mara has finished his questions for West. O'Mara tried to call Rionda to the stand, but the judge interrupted him. She is now telling the defense it is a better use of time to handle the discovery violation hearing post trial. She is now recessing court for 10 minutes, and when court resumes she wants to tackle the issue of whether the 911 voice analysis technology will be admissible.
2:23 p.m. ET: Rionda has finished he cross examination of West. O'Mara is now asking West questions.
2:20 p.m. ET:"Regrettably discovery is still going on in this case to this day," said West.
2:17 p.m. ET:"We caught you hiding the information," West raising his voice at Rionda.
2:13 p.m. ET: West said in one of the intial reports regarding Martin's phone did show text messages about guns.
2:09 p.m. ET: Rionda wants to know why the defense waited to disclosed to prosecutors they had hired an expert to examine the source file from Martin's phone until a few weeks ago.
2:06 p.m. ET: O'Mara has finished his direct examination of West. Rionda is now asking him questions on cross examination.
2:04 p.m. ET: West said the defense has not been able to go through the latest FDLE report on the phone, and he doesn't the firm will have time before the trial starts to process and investigation the information in the report.
2:01 p.m. ET: The defense recieved another report on Martin's phone from the FDLE on June 4, according to West.
1:59 p.m. ET: West said the defense hired an expert to examine the source file from Martin's phone, but he is unsure if he was able to get all the information off the phone.
1:56 p.m. ET: " We did not get the source file, until after we made several requests for it," said West.
1:53 p.m. ET: West said the defense got a copy of the phone's source file from the Florida Department of Law Enforcement in February 2013. He says as of Feb 22, 2012, they had no knowledge of new information, but they did have the source file.
1:50 p.m. ET: West is walking through all the differences between the reports the defense received about the evidence on Martin's phone.
1:45 p.m. ET: The defense received several reports on the evidence off Martin's phone according to West.
1:42 p.m. ET: West is walking through all the communication the defense had with prosecutors and investigators about Martin's phone. It seems the defense got information and evidence from prosecutors in a piecemeal fashion.
1:40 p.m. ET: The judge is on the bench, and O'Mara has called Zimmerman's defense attorney Don West to the witness stand.
12:40 p.m. ET: The attorneys do not have any more questions for Kruidbos. He has concluded his testimony. Court is now in recess until 1:40 p.m. ET. The live blog will pick back up when court resumes.
12:39 p.m. ET: Kruidbos said he has been told in the past to not put specific case identifying information into internal emails. The attorneys are now at a sidebar with the judge.
12:36 p.m. ET: O'Mara asked Kruidbos if the conversation they had a few days guided or changed his testimony today in anyway. Kruidbos said no O'Mara has not affected the veracity of his testimony in anyway.
12:33 p.m. ET: Kruidbos said he has been put on administrative leave from state attorney's office, but he said he would not state's attorney office for putting him on leave, because of his involvement with this case.
12:29 p.m. ET: Kruidbos said if Rionda had reached out to him before today's hearing he would have spoken with him.
12:28 p.m. ET: Rionda has concluded his cross-examination of Kruidbos. O'Mara is now asking him questions on re-direct examination.
12:25 p.m. ET: Rionda is taking a moment to review documents.
12:21 p.m. ET: O'Mara is objecting to Rionda statement that O'Mara did have the information from Martin's phone. He said Rionda was just making stuff up. Rionda said he would restate the questions, and judge Nelson told O'Mara to keep his commentary out of his objections.
12:18 p.m. ET: Kruidbos said he has worked on legal cases for the state attorney's office, and he has never had concerns about a discovery violation.
12:15 p.m. ET: Rionda said the defense was invited to be present when the phone was being examined and processed. Kruidbos said he was unaware that the prosector's extended that invitation.
12:12 p.m. ET: Kruidbos said he was unaware of White blogging about anything going on with the state attorney's office.
12:09 p.m. ET: Rionda asked Kruidbos about how his duties at the attorney's office have be curtailed, and he has less authority. Rionda is implying that Kruidbos may have an axe to grind with the state's attorney office.
12:06 p.m. ET: Rionda asked Kruidbos why he would be worried about being fired if he hasn't done anything wrong. Kruidbos said it is just a concern.
12:04 p.m. ET: Rionda is walking Kruidbos through his conversation he had with O'Mara a few days ago. Kruidbos said the coversation was very similar to what he discussed with O'Mara during direct examination.
12:01 p.m. ET: Kruidbos said the phone conversation he had with O'Mara was conference call and White was on the call as well.
11:58 a.m. ET: Rionda asked Kruidbos about a conversation with O'Mara a few days ago on the phone.
11:55 a.m. ET: Rionda asked Kruidbos if he was just tasked originally with printing report, and did he do this extra work on his own. Kruidbos said he was supposed to use the software and print the report.
11:51 a.m. ET: Kruidbos said Rionda told him they would only turn over the source file of Martin's phone to the defense.
11:48 a.m. ET: White just objected about how Rionda was questioning Kruidbos. He said Rionda was raising his voice and being repetitive. Rionda apologized and changed his tone.
11:45 a.m. ET: Rionda said in a deposition on April 25, 2012, O'Mara asked a potential witness about the gun which indicates the defense may have actually had the information.
11:43 a.m. ET: Rionda is asking Kruidbos if he assumed the information was turned over the defense. Kruidbos said he wasn't sure, but he was concerned about his exposure.
11:42 a.m. ET: O'Mara has completed his direct examination of Kruidbos. The attorneys are now at a sidebar with the judge.
11:41 a.m. ET: Kruidbos said he is concerned about losing his job, because he has come forward. However, he believes it is worth it to make sure this is a fair trial.
11:40 a.m. ET: O'Mara asked Kruidbos if he has an axe to grind with the state's attorney office. Kruidbos said the only reason he came forward was because of his potential liability.
11:38 a.m. ET: Kruidbos said he picked White, because he is a good attorney.
11:36 a.m. ET: Kruidbos said in late March or April 2012 he became concerned the additional information from Martin's phone had not been turned over to the defense, and he became concerned about "criminal exposure." So he sought advice from White.
11:31 a.m. ET: O'Mara is asking Kruidbos about a conversation in May 2012 he had with Rionda about the cell phone information, because the defense was saying they did not get all the information from Martin's phone.
11:28 a.m. ET: Kruidbos is going through all the conversations he had with employees at the state attorneys office about how he found more information on Martin's phone.
11:24 a.m. ET: At some point, Prosecutor Guy told Kruidbos that they could send the source file from the phone to the defense.
11:22 a.m. ET: Kruidbos turned over the new report to Rionda, and he said he would look into it.
11:20 a.m. ET:
Kruidbos says there were 2958 photos in original report. In Kruidbos rreport, there were 4275 photos. Photos included Martin blowing smoke, pot, underaged naked fmales, clump of jewelry on bed.
He also says there were deleted text messages re a transaction for a firearm. The investigator said "it looks like they were selling a gun" and said they have to talk to Rionda.
11:19 a.m. ET: Kruidos is explaining how the text messages from the report from Martin's phone was exported to an Ex-cel spreadsheet.
11:16 a.m. ET: The report indicated there photos on Martin's phone of underage naked females, maijuana, and someone holding a gun. Kruidbos also said there was a picture of a clump of jewelry.
11:14 a.m. ET: Kruidbos said when he printed up a 900 page FDLE report from Martin's cell phone in late 2012/early 2013, he noticed info was missing. Concerned attys did not have all the info they needed to prepare the case, he reported to an SAO investigator and later Bernie De La Rionda.
When Kruidbos obtained the origianl source file from the FDLE, he generated a report that was about three times more than the original report.
11:00 a.m. ET: Kruidbos said the software created a 900 page report about the contents on Martin's phone.
10:59 a.m. ET: O'Mara is asking Kruidbos to explain how phones also GPS information recorded on them.
10:57 a.m. ET: Kruidbos said he uses a software that extracted all the information on Martin's phone and creates an easy to read report that shows phone numbers, text messages and photos.
10:54 a.m. ET: Kruidbos is reponcible for the IT systems used by the Florida state attorney's office. He is explaining how he was able extract evidence off of Martin's phone.
10:51 a.m. ET: Judge Nelson has taken the bench, and O'Mara has called Ben Kruidbos to the stand.
10:47 a.m. ET: Martin Family Attorney Ben Crump just released this statemen on the use of expert voice analysis testimony at trial:
"It is ridiculous for the Zimmerman defense team to argue that expert voice analysts should not be permitted to testify at the trial when George Zimmerman himself stated the voice crying for help on the 911 recording "doesn't even sound like me." Zimmerman made this statement in his interview with Detective Chris Serino on 02/29/12 just 3 days after the tragic killing of Trayvon Martin. Expert voice analysis is necessary to assist in identifying the voices on the 911 tape."
10:40 a.m. ET: Here is a heated exchange between Rionda and White from earlier:
White: I remember a lot of things sir. I remember those things that I believe I need to remember. After 33 years you learn to sort of box off things that need to be remembered and others that you can sort of let go.
Rionda: Unpleasant things you want to put to the side.
White: No, not necessarily.
Rionda: Wouldn’t you agree that assumptions… we shouldn’t rely on them. We should rely on facts.
White: Well you know what assume stands for don’t you? (What?) Make an ass out of you and me so yes I generally agree with that.
10:30 a.m. ET: Court is taking a brief recess.
10:28 a.m. ET: White has been excused from the witness stand.
10:25 a.m. ET: O'Mara has completed his re-cross examination, and now Rionda is asking White questions. Rionda asked White if he is throwing himself in the case to get attention, because he plans on running against Corey in the future. White said that is absolutely not true.
10:20 a.m. ET: White said his decision to come forward in this case was based on his status as an, "officer of the court."
10:18 a.m. ET: O'Mara asked White if he would make up information presented to the court. White said no he would not even if he did have a bias hypothetically.
10:15 a.m. ET: White said he does not believe there was any concern about his performance in the state attorney's office.
10:13 a.m. ET: Defense attorney O'Mara is now asking White question on re-direct examination.
10:11 a.m. ET: White said he agreed with Rionda that the court should not rely on assumptions. White said assume stands for, "making an ass out of you and me."
Rionda has ended his cross-examination of White.
10:08 a.m. ET: Rionda showed the court a series of emails that did indicate the state attorney's office was going to review White's performance and other people in the department.
10:05 a.m. ET: Rionda keeps hammering on how White ended his employment with the state attorney's office. He claims White left because he was being demoted for poor performance. White has said multiple times that this inaccurate.
10:01 a.m. ET: White said he was ethically obligated to approach the court about this issue and opposing counsel.
"I would been more than happy to not be involved," said White.
9:58 a.m. ET: At times White seems to get frustrated with prosecutor Rionda and will raise his voice.
9:56 a.m. ET: White said he felt the need to find out if the prosecutor had turned over to the defense evidence found on Martin's phone about including text messages about the sale of a gun.
White said Kruidbos was also worried that Rionda turned over photos found on Martin's phone including:
An African American male's hand holding a firearm
An underaged female
9:52 a.m. ET: Rionda is asking White about the contact he has had with O'Mara's law firm.
9:49 a.m. ET: White said Kruidbos approached him and asked him if he had any "criminal exposure" due to Rionda's actions that may amount to a discovery violation.
9:46 a.m. ET: Prosecutor Rionda is grilling White about his former employment with the state attorney's office.
9:42 a.m. ET: White is reading his resignation email in open court. Rionda responded and said his resignation was accepted, and the office would be giving him a plaque to honor his service.
9:39 a.m. ET: Rionda is asking White about how hi his employment ended with the State attorney's office.
9:37 a.m. ET: Zimmerman is watching White testify, but isn't showing any emotion.
9:35 a.m. ET: White is representing Ben Kruidbos, an employee with the state's attorneys office that may have information about whether prosecutors violated the rules of discovery.
9:31 a.m. ET: Prosecutor Rionda is asking White about his alleged performance problems when he was working for the state attorneys office. Rionda said White was demoted. Rionda is trying to paint White as being biased against the state attorneys office.
9:29 a.m. ET: White is on the stand now. He used to work for the Florida state attorneys office.
9:25 a.m. ET: The first witness will be attorney Wesley White.
9:23 a.m. ET: Judge Nelson is now moving on the issue of whether prosecutors violated the rules of discovery.
9:22 a.m. ET: Judge Nelson has denied the defense's motion regarding the keeping three witnesses anonymous. Nelson also said as of now witness names will remain under seal.
9:19 a.m. ET: O'Mara said that these witnesses are concerned if a there is an acquittal in this case.
"They concerned they could be subject to ridicule or retribution." said O'Mara. "They are very concerned, and may have to move out of their residence."
9:18 a.m. ET: Prosecutor Guy is asking the judge to deny the defense's motion about keeping three witnesses identities anonymous.
"It could prejudice the jury," said Guy.
9:16 a.m. ET: Media attorney Ponce said the court needs to have a hearing to determine whether some witnesses identities can be kept anonymous.
9:11 a.m. ET: Attorney Rachel Fugate for the Orlando Sentinel is arguing that what goes on in courtroom is "public property" and would restrict public's right to the proceedings.
9:07 a.m. ET: Zimmerman's attorney Mark O'Mara arguing there are three witnesses who will have testimonyy that "will have impact on the jury's decision." They do not want to be involved in the case and want to be anonymous.
9:03 a.m. ET: First issue: Scott Ponce, media attorney is testifying via phone about issue of keeping certain witnesses' identities confidential.
9:00 a.m. ET: Judge Nelson is on the bench and court is now in session.
8:59 a.m. ET: Zimmerman is in the courtroom.
8:53 a.m. ET:
From HLN's producer in the courtroom:
George Zimmerman is in the courthouse; his brother Robert is already in the courtroom.
Defense attys Mark O'Mara and Don West are present.
State Attorney Angela Correy, and Asst. State Attorneys Bernie De La Rionda, and John Guy are present as well.
8:00 a.m. ET: Today's hearing should start around 9:00 a.m. ET.