The night Memphis police officer Sean Bolton was shot and killed on a street in Parkway Village, Jacoba Boyd was one of the first officers to make the scene and used his paramedic training to try to save his friend’s life.

The 12-year police veteran recalled seeing Bolton lying face down at the edge of a driveway. He performed CPR on his friend until an ambulance arrived.

“His face was blown apart,” an emotional Boyd recalled. “I had to seal the wound while we were giving him chest compressions and rescue breaths. Every time we would try to blow into his mouth, it would come out the side, so I had to cover it with a glove in my hand.”

Boyd testified on the fourth day of the capital murder trial of Tremaine Wilbourn, the 32-year-old man charged with first-degree murder in the slaying of Bolton on Aug. 1, 2015.

Boyd said he and Bolton bonded because the two were both former Marines and he talked to Bolton about joining the police department.

The night Bolton was shot, Boyd said, he immediately knew something was wrong when he heard a citizen's voice on the radio.

“If you can’t reach up and grab your shoulder mic to tell us what’s going on, it means something is really, really bad,” Boyd said.

When he arrived on Summerlane Avenue, he found Bolton unresponsive on the ground.

“I ran up and relieved one of the officers and started CPR to try to save my friend’s life,” he said.

Boyd was one of 11 witnesses called by the state to testify Thursday in the death penalty case.

During the morning session, four neighbors who either heard the gunshots the night Bolton was killed or saw the gunmen firing and then fleeing, testified.

Christopher Lanier was in his house when nine gunshots interrupted his television show. He said he went to check on his nephew, Marquis Wright, when Wright rushed into the house and told his uncle he had witnessed a police officer getting shot. Lanier said at first he didn't believe Wright.

Lanier testified he went outside and saw his younger brother’s car parked on the street and a squad car with its spotlight shining brightly. He said he walked around the police car because he didn’t see the officer.

“I seen the police officer laying in the driveway,” Lanier said. “He was laying face down with his hands covering his face. I told him to be still because I was going to try to get him some help. Everybody outside was trying to call 911 but the line was busy.”

He said he told Bolton not to speak because “he was hurt” and Lanier then used the officer’s radio to call for help.

“I told him I was going to get his walkie-talkie off his shoulder, that I was trying to get him some help, and I did.”

Prosecutors played Lanier’s call to 911 for the jurors. He can be heard yelling, “Y'all got a man down. Hurry up, he bleeding, man. Please, hurry."

Deborah Crutchfield said she also was in her home watching television around 9 p.m. that August night, when a bullet sent her granddaughter crawling on the floor to safety.

“She crawled from the living room to the den, and I heard something shatter,” Crutchfield said.

She said she went outside to investigate and saw Bolton lying across the street in her neighbor’s driveway.

“I couldn’t see his face,” she said. But she later learned it was the officer she had seen many times in the past talking to neighborhood kids and waving to residents as he patrolled the area.

Otagar Jones and his girlfriend, Krystal Freeman, were sitting on their porch the night of the shooting.

Jones said he saw the gunman, later identified as Wilbourn, backing up in the middle of the street and firing five to six shots, but he did not see the gunfire strike the officer because a large bush in his yard blocked his view.

Before the shots were fired, Jones said, he heard the defendant and the officer “scuffling” in the street and heard Wilbourn yelling for people to record the incident on their phones.

“He (Wilbourn) said, 'Pull your phones out, they’re trying to kill us. I haven’t done anything,'” Jones told prosecutor Reggie Henderson.

Freeman also said she heard Wilbourn yell, “Get your cameras out, get your cameras out. They are killing us.”

During opening statements, defense attorney Juni Ganguli referenced the 2015 officer-involved fatal shooting of 19-year-old Darrius Stewart, shot by former Memphis police officer Conner Schilling in July 2015, a month before Bolton was killed.

The death of Stewart, an unarmed black teen, killed by a white police officer triggered several Black Lives Matter protests in the city, including the shutdown of the Hernando DeSoto bridge.

Before Ganguli could delve further into his reference about the Stewart shooting and the connection with his client, prosecutors lodged their objection, and the jury was told by Judge Lee Coffee to disregard the comment.

During Thursday’s testimony, the jury also heard from a man Wilbourn is accused of carjacking minutes after shooting Bolton.

Desric Ivory said he was in the driveway of his home in the Parkway Village area when a man approached and pointed a gun at him.

He said the defendant stole his 2002 Honda Accord. Ivory immediately reported the carjacking to police, and prosecutors played his 911 call for jurors.

Ivory told dispatchers that Wilbourn told him that night, “I just shot a police officer. I need your car.”

Wilbourn pleaded guilty to the carjacking charge along with being a felon in possession of handgun and was sentenced to 28 years during a hearing last year.

The capital murder trial resumes Friday at 9 a.m. and could continue through the weekend.