A Baltimore police officer who police say was shot to death by the ex-fiance of the woman he dated was “a happy-go-lucky guy” and a good student as a child in his native Brooklyn, relatives and friends said.

After yesterday’s funeral for Officer Adam Vazquez in Brooklyn’s Sunset Park neighborhood, family, friends, and teachers gathered on the street to remember the 26-year-old officer.

“He was a happy-go-lucky guy, a straight-A student and a straight-laced man,” Vazquez’s uncle and godfather, Eugene Vazquez, who last saw the officer at a Thanksgiving meal with members of the close-knit family, said.

As the casket emerged from Our Lady of Perpetual Help Church, a contingent of white-gloved Baltimore police officers lined up on either side to salute one of their own. One officer held Vazquez’s police hat in his hand.

Vazquez and Officer Leslie Holliday, 34, who both worked the midnight shift, were shot and killed a week ago in Vazquez’s Pikesville, Md., town house. Eugene Victor Perry Jr., a 33-year-old Maryland Department of General Services officer who guarded state facilities in Annapolis, was charged in the killings. Police said Mr. Perry is Holliday’s ex-fiance.

Vazquez and Holliday were upstairs when Mr. Perry came to the door and knocked, police said, and several other people who were in the house visiting answered. Police said Mr. Perry, armed with a gun, pushed his way in, went upstairs, and shot the couple multiple times.

Holliday’s mother, Bernice Johnson, told the Baltimore Sun that her daughter had been engaged to Mr. Perry until last summer. Holliday had three children by a previous marriage and was living with her mother in Joppatowne, a Baltimore suburb. Her funeral was planned there today.

Vazquez served 4 and a half years on the Baltimore police force.

“He was happy, he never had a care in the world,” Officer Neil Worrell, his partner on the midnight shift, said. “Everything that was around Adam was good. His death was a surprise to everyone.”

In multiethnic Sunset Park yesterday, he was remembered as a schoolboy.

“He was the tallest and the strongest kid. And he could carry the boxes when we had fund-raisers,” Theresa Maddalena, the head fund-raiser for Our Lady of Perpetual Help’s elementary school, said.

As the casket left for nearby Green-Wood Cemetery, Vazquez’s niece, 5-year-old Jaed Vazquez, stretched out her arms, crying uncontrollably.