Police officers pay their respects ahead of the funeral for Officer Lorne Ahrens in Plano, Texas, on July 13, 2016.
Thompson was remembered by Pastor Rick Lamb as a fearless public servant. Ahrens was one of five police officers killed during protest in Dallas last Thursday.
Dallas police say the officer is stable at Parkland Memorial Hospital. "I'm here to insist that we are not as divided as we seem".
A public service for the former Army ranger is scheduled for Thursday at a Dallas church, where he worked security.
The officers buried today were Brent Thompson, 43, Michael Smith, 55, and Lorne Ahrens, 48, while the services for Michael Krol, 40, and Patrick Zamarripa, 32, will be arranged in the coming days.
Five local law enforcement officials traveled to Dallas this week to show their support during the funerals of the five officers killed by a sniper during a protest in Dallas last week.
The shootings in Louisiana and Minnesota were the latest in a series of high-profile police killings of black men in various U.S. cities that have brought intense scrutiny of police use of force, particularly against black suspects.
Widow Heidi and daughters Victoria, 14, and Caroline, 9, wrapped their arms around each other before Smith's younger sister delivered a teary remembrance of her brother.
DPD says the officer wasn't part of the actual procession itself, and he was awake and communicating after the incident. But the two were such a pair that it was rare to find one without the other. Sterling was killed after officers responded to a call that he had threatened someone with a gun.
Ahrens' funeral will take place in Plano.
Coverage of the service for DPD officer Senior Cpl.
"It's been very uplifting for us, a morale booster", he said. "You know your hate made us stronger", she said, speaking of Johnson.
Mourners grieve at a casket of slain Dallas police Sgt. Michael Smith during a visitation for his body Tuesday. To see the ambush of 12 police officers that resulted in the death of 5 officers and 7 officers and 2 civilians injured is hard to comprehend and we wonder how this can happen.
Friends from the Dallas Police Department described him as a powerful presence on the force: a man who could easily rip burglar bars off windows with his bare hands as police raided drug houses. Lorne Ahrens have told law enforcement officers from as far away as Canada that Ahrens was a "supersized can of kickass" who was a voracious reader with an intelligence that was equal to his size.