DALLAS — Brent Thompson, a Dallas Area Rapid Transit officer killed during the unrest in Dallas, was the first officer to die in that agency's line of duty.
"Brent was a great officer," said James Spiller, police chief of DART. "He was an outstanding patrol officer as well as a rail officer. We have the highest respect for him."
Spiller and Gary Thomas, DART's president/executive director, talked about Thompson and the violence in Dallas in appearances Friday on CNN's "New Day."
Twelve officers were shot -- five are dead and seven injured -- in the attack downtown, the mayor's office said. The violence came amid protests over the deaths of two African-American men by police officers in Minnesota and Louisiana.
Four of the other slain officers were with the Dallas police.
A police trainer in Iraq, Afghanistan
Thompson, 43, a nearly seven-year veteran of the transit force, got married in the last two weeks, Spiller said. His spouse was a fellow transit officer
"He was in great spirits from his recent marriage," Spiller said.
According to Thompson's LinkedIn profile, he was "motivated by a '' 'Team' atmosphere."
"I enjoy working on challenging tasks and problem solving with my peers. I am constantly looking for different ways to serve the department, this helps to keep my work from becoming sedentary and boring," the officer said in his LinkedIn summary.
Thompson was an international police liaison officer for DynCorp International for nearly five years, starting in 2004, his profile said.
"My last position as an IPLO was Chief of Operations for Southern Iraq. I was responsible for the day to day operations conducted by our American police officers who trained and mentored the Iraqi Police," he said on his profile.
He was in southern Afghanistan as well, according to the profile, where he was a "Team Leader" and "Lead Mentor" to the "Southern Provincial Police Chief."
"In all locations we mentored and taught our Iraqi/Afghan counterparts democratic policing, and assisted in the establishment of the police department in these locations."
During the "New Day" interview, Thomas touched on Thompson's international service.
"He was a dedicated officer, dedicated to the safety of Americans, all over the world certainly," he said.
According to his LinkedIn profile, Thompson lived in Carrollton, Texas. Spiller said Thompson hailed from Corsicana, Texas, south of Dallas.
According to his LinkedIn profile, Thompson attended high school there and taught at Navarro College Police Academy, also in Corsicana.
Patrick Zamarripa: Navy veteran and father of two
Patrick Zamarripa, a father of two, was one of the four Dallas police officers who died, according to social media posts from family members and reports from local news outlets.
Military records show he was a U.S. Navy veteran who had been deployed to Bahrain as part of the Iraq War effort.
His brother shared a photo on Twitter with the caption: "Love you brother. Couldn't be prouder. We'll see you again. #PrayForDallas."
In a Facebook post, Patrick's father, Rick Zamarripa, said his son had been taken to Parkland Hospital and asked for prayers.
Michael Krol's lifelong dream was to be a police officer, his uncle, Jim Ehlke, told CNN affiliate WDIV.
"He got into law enforcement and worked really hard to be a police officer. He spent some time at the correctional facility. It wasn't quite what he was looking for, so he worked pretty hard to find a job and got one in Dallas," Ehlke said.
Krol worked with the Wayne County Sheriff's Office from 2003 to 2007.
The sheriff's office issued a statement: "We are saddened by the loss of the dedicated officers in Dallas---one of whom was a former member of this agency---and also the wounding of the other officers. Those officers made the ultimate sacrifice and died honoring their oaths to protect and serve. Our thoughts and prayers go out to their families and also the Dallas Police Department."
Dallas Officer Lorne Ahrens died in the ambush, according to the Washington Post and local media reports. Ahrens was a 14-year veteran of the force, according to media reports. He was 48.
He was devoted to his kids and proudly wore his uniform to their elementary school, where he'd become popular as a regular volunteer giving personal safety talks. He leaves behind his wife, who is a detective with Dallas Police, and their two children.
Dallas police Officer Michael Smith was among the dead, according to CNN affiliate KFDM and local media reports. Smith joined the department in 1989, his sister told CNN affiliate KFDM. He was 55.
Smith was a cop's cop. That's not a cliche. It's actually an award he won multiple times from the Dallas Police Association.
Once, during his 27 years in the department, he blocked his partner from getting stabbed, taking the deep gash -- and 31 stitches -- himself. His life partner, his wife, he was married to for 20 years. With her, Smith had two teenage children.