CLEVELAND, Ohio -- The trial of Michael Brelo, the Cleveland police officer charged in the deaths of Timothy Russell and Malissa Williams following a police chase and shooting on Nov. 29, 2012, begins today.

Related: Everything you need to know before the start of the trial for Cleveland police officer Michael Brelo

Follow our coverage of the trial beginning at 9 a.m.

5:20 p.m. The proceedings end for the day. The prosecution says six expert witnesses are expected later this week. Judge O'Donnell says he plans to visit the East Cleveland scene of the shooting on Friday.

On Tuesday, an East Cleveland officer and a BCI representative are expected to testify. It's possible that members of Williams' and Russell's families will testify, too, according to the Cuyahoga County Prosecutor's Office.

Follow our live coverage of the trial again tomorrow beginning at 9 a.m.

5:08 p.m. Royster questions Nan again about whether he believes police followed their training the night of the chase and shooting. Nan says some officers' actions during the chase and shooting did not follow training. He said they were reacting to a threat.

4:56 p.m. Mack asks Nan if, based on what he knew in the moment and what he heard on the radio transmissions, he and his fellow officers should've acted in the same manner.

"Yes," Nan says.

Mack then asks if it was the most intense incident Nan has been involved in.

"Without a doubt," Nan says.

4:41 p.m. Mack asks Nan whether he heard officers talking about a gun on the 22-minute recording, prior to another officer saying there was no gun involved. Mack also asks Nan whether he heard an officer say the Chevrolet's driver attempted to run over another officer during the chase. Nan says yes.

Mack is now asking Nan to read parts of a transcript of the recording.

4:30 p.m. The trial resumes with defense attorney Fernando Mack questioning Nan. Mack asks Nan about his record with the Cleveland Division of Police. Nan says he's been involved in "quite a few" incidents in which officers fired shots.

Nan reiterates that he believed the loud boom he heard the night of the chase and shooting was gunfire.

4:12 p.m. Judge O'Donnell announces a 10-minute break before the defense has an opportunity to question Nan.

4:10 p.m. Royster asks Nan to read a summary of the statement he made to BCI investigators before questioning him about it.

3:55 p.m. Royster asks Nan whether he now believes the loud boom he heard coming from the Chevrolet was the sound of the car backfiring. Nan says no.

3:54 p.m. The recording has finished playing. Royster replays a portion in which an officer says the driver does not have a gun in his hand. The officer says on the recording that the driver was wearing black gloves.

3:38 p.m. The police radio transmissions can be heard here.

3:34 p.m. The prosecution is now playing a recording of police radio communications from the night of the chase and shooting. The recording is approximately 22 minutes long, prosecutor Sherrie Royster says.

3:27 p.m. Nan says he reported the description of the car and told dispatch he believed he heard shots. He attempted to follow the car but soon lost track of it, he said.

3:17 p.m. The next witness is Cleveland police officer Vasile Nan, who was parked in front of the Justice Center when he heard a loud boom come from the Chevrolet. He said he believed the boom was a gunshot.

"When it passed me, I heard what I described as a gunshot, and I got startled," Nan said.

3:01 p.m. Jordan says he felt badly that he was unable to stop the car on East 18th Street, to prevent the chase and shooting from happening.

2:57 p.m. Jordan says he went back to the 2100 block of Lakeside Avenue and spoke with several people he'd seen gathered around the car to get information about its occupants.

Jordan says he did not see the Chevrolet's driver or passenger holding a gun, and he did not realize the car was the one involved in the chase until the following morning.

2:49 p.m. When Jordan approached the car he heard a woman screaming obscenities, asking why he was bothering them.

The driver ignored Jordan's order to turn off the car and instead drove off. Jordan followed the car for several blocks before losing sight of it.

Jordan says he did not recognize the woman and did not see the driver's face.

12:51 p.m. D'Angelo concludes his opening statement by reiterating his belief that Brelo's actions were justified.

12:46 p.m. D'Angelo says the prosecution's theory about the chase and shooting shaped the investigation.

12:31 p.m. D'Angelo says Brelo didn't jump on the car because he wanted to "be Rambo," but because he believed he was in danger.

12:29 p.m. D'Angelo says Brelo reloaded his gun a second time while he was standing on the hood of a patrol car or on the Chevrolet. At that time Brelo believed he was still in danger, he says.

12:24 p.m. In their opening statements, prosecutors said Brelo fired 15 of the final 18 shots. D'Angelo says that means at least one other officer believed there was still a threat.

12:16 p.m. D'Angelo also says that while BCI investigators matched shell casings to the guns that fired them, they were unable to determine the sequence in which the shots were fired.

12:11 p.m. D'Angelo says the fact Russell did not try to drive between two police cars that were blocking his path in the middle school parking lot is significant.

He says the court could infer that Russell had already suffered a fatal gunshot wound at that time, before Brelo climbed onto the hood of the car.

11:59 a.m. D'Angelo says that in radio recordings, officers relay their belief that someone in the car had a gun.

He also says that although investigators never found a gun, Russell and Williams might have disposed of one during the chase.

11:56 a.m. "[The officers] did not respond because of the color of the occupants of that vehicle," D'Angelo says. "They were trying to serve and protect. They were trying to do the right thing."

11:54 a.m. D'Angelo says it's unclear whether the threat was over when other officers stopped shooting.

He also says the fact Williams and Russell were black had "nothing to do" with the officers' actions during the chase and shooting.

11:42 a.m. D'Angelo, who previously represented the Cleveland Police Patrolmen's Association, said he believes the officers involved in the shooting were trying to do their duty.

"They are simple, ordinary people who try to do the best they can, and they're put in some very dangerous situations," he says.

11:35 a.m. D'Angelo says Judge O'Donnell must consider whether Brelo's use of force was justified in the moment, instead of considering it with the benefit of hindsight.

11:31 a.m. The trial resumes. Defense attorney Patrick D'Angelo is giving his opening statement.

11:15 a.m. Bell ends his opening statement by saying the case is a historic and pivotal case.

Judge O'Donnell announces another 15-minute break before the defense has a chance to offer its opening statement. The trial will resume about 11:30 a.m.

11:12 a.m. "The evidence will show that there are good police officers who lost their way that night during the pursuit," Bell says.

11:03 a.m. Bell says an audio expert determined that after an initial barrage of shots, officers stopped shooting for 1.6 seconds before one more shot was fired. The shooting stopped for another 2.6 seconds, after which 18 more shots were fired. Evidence will show Brelo fired 15 of the final 18 shots from the Chevrolet's hood, Bell said.

10:57 a.m. The evidence will show that both Williams and Russell were alive when Brelo was standing on the hood, Bell says. Williams was shot from above 11 times and Russell was shot from above six times, he says.

10:49 a.m. Bell says testimony from medical experts will show Williams was alive when Brelo was standing on the Chevrolet's hood and firing shots into the car. He says the evidence will show that the shots from above killed Williams.

Williams had her hands up when Brelo was standing on the hood, Bell says.

10:43 a.m. Bell shows photographs of the clothes Russell and Williams were wearing. He also shows a photo of a mannequin depicting Williams' body, with markings showing where she was shot.

10:38 a.m. The prosecution will argue that Brelo gave false statements to investigators, Bell says.

For example, Brelo told investigators he fired five or six shots, thought his gun jammed, then reloaded his gun in his police car. Those statements proved to be untrue, Bell says.

"The numbers don't add up. He's not telling the truth," Bell says.

10:29 a.m. The trial resumes with more of Bell's opening statement.

10:13 a.m. Judge O'Donnell calls for a short break. The trial is expected to resume about 10:30 a.m.

10:11 a.m. Brelo told investigators that he could not remember jumping on the Chevrolet's hood, Bell says.

However, Bell says Cleveland Police Lt. Mark Ketterer will testify that he spoke with Brelo on the phone the day after the shooting. Ketterer will testify that Brelo talked about standing on the hood and shooting down at the car, and that Brelo described it as "like being back in Iraq," Bell says.

10:05 a.m. Bell says Brelo should have stopped shooting because police cars had surrounded the Chevrolet and other officers had stopped shooting.

"Here the chase had stopped. The shooting had stopped. The threat was over," Bell says.

10:00 a.m. Bell says an expert on police use of force will give testimony saying Brelo acted unreasonably when he jumped onto the Chevrolet's hood.

9:53 a.m. Bell says Brelo lost control when he jumped on the Chevrolet's hood during the shooting. Bell says the shots fired from atop the Chevrolet's hood were "the point where [Brelo's] actions became criminal."

9:47 a.m. Prosecutor Rick Bell begins his opening statement by calling Nov. 29, 2012 a tragic day for Williams and Russell and a "disgraceful" day for Cleveland police.

9:41 a.m. Barnhill provides a breakdown of the 137 shots fired at the Chevrolet. Brelo fired at least 49 shots, she says.

9:37 a.m. Barnhill also references an illustration showing the Chevrolet Malibu, two police cars, and the locations where the bullets hit the Chevrolet.

9:34 a.m. Barnhill is using a model of the shooting scene to illustrate the end of the chase. It includes small models of Cleveland police cars and the Chevrolet Malibu.

9:30 a.m. More than 60 police cars were involved in the 22-mile chase, which began in downtown Cleveland and ended in the Heritage Middle School parking lot in East Cleveland. The Chevrolet Malibu that Russell was driving reached speeds of 110 mph during the approximately 25-minute chase.

9:24 a.m. A detailed account of the police chase can be found here.

9:19 a.m. Prosecutor Erica Barnhill will speak next about the police chase, Royster says.

9:17 a.m. Royster speaks about Timothy Russell and Malissa Williams, who died following the police chase and shooting. Royster describes Russell's struggles with substance abuse and his relationship with his son. She also describes Williams' health issues, including schizophrenia.

"They both were loved, and they both have family and friends in this courtroom today," she says.

9:10 a.m. Prosecutor Sherrie Royster says witnesses to the chase and shooting, police officers, medical experts, automobile engineers, experts in police tactics, experts in ballistics and others will testify in the coming weeks.

"They will tell you how the defendant, Michael Brelo, crossed the line from someone who enforces the law to someone who broke it that night," Royster says.

9:04 a.m. The trial begins with opening statements. Prosecutors Rick Bell, Sherrie Royster and Erica Barnhill will give opening statements today, according to the Cuyahoga County Prosecutor's Office.

9:00 a.m. Michael Brelo, his attorneys and prosecutors are gathered in the courtroom awaiting the start of the trial, which is expected to begin shortly.

Brelo was indicted on two counts of voluntary manslaughter on May 30, 2014. He pleaded not guilty to both counts.

Thirteen police officers shot 137 bullets following the car chase, hitting Russell 23 times and Williams 24 times. Prosecutors have argued that only Brelo continued to shoot after other officers perceived any threat was over.

Cuyahoga County Common Pleas Judge John P. O'Donnell has forbidden live streaming from the courtroom, but we'll have a live blog throughout the trial.