"It's sad to say, but the gun culture that we got nowadays, everybody wants to solve their problems at the end of a pipe," Sperlein said. "I've got a temper, so I know I shouldn't own a gun. ... It was all over a woman. I don't get it."

Fire Chief Jeffrey Segal issued a statement regarding Hoffman's death, noting he was a "third-generation member of the fire department" who had been with the city department since 2006.

"We offer sincere condolences to the Hoffman family as they grieve this terrible loss. They are in the thoughts of every member of the Baltimore City Fire Department today," Segal said.

Segal noted that this summer, Hoffman was credited with helping to reunite a 3-year-old toddler who had wandered from his home in Anne Arundel with his family.

Hoffman had discovered Paul Marshall Jr. along the streets of Linthicum at 3:45 a.m. on July 23. "It kind of startled me. " Hoffman told The Sun. "I got him and asked him, 'What's the matter, buddy? Where do you live?' And all he could do was point up the road."

Hoffman and police tracked down the youngster's house. The boy's father, Paul Marshall, later thanked Hoffman, saying, "This really scared us thinking everything that could have happened."

The department's Fire Boat Station flew its flag at half-mast in mourning of Hoffman's death. The Hollins Street station, where Hoffman served, had black material draping the building front on Sunday afternoon.

In a statement, the Baltimore Police Department gave its "deepest sympathies to the families, loved ones and friends of whose who died in this terrible incident."

"Those left behind have suffered an immeasurable loss and will be in the collective thoughts and prayers of the members of the Baltimore Police Department," the statement said.

It was the second time this year a Baltimore Police Officer, accused of a domestic violence homicide, has taken his own life, authorities said. In August, officer James Walton Smith, 49, awaiting trial for murder in the death of his fiancee, died in an apparent suicide in jail.

At the scene of the Glen Burnie killings — in the 1100 block of Armistead Road — neighbors said they were "shaking" that such violence could take place near their homes.

Scheper choked back tears as he talked about the death of his longtime friend.

"It's so tragic," he said. "I don't even have any words. Me and Andy were the closest, and now he's gone. I don't know why this guy would do this. To kill somebody and then take your own life, to me you're a frickin' coward."

Scheper said when he first heard the news, he couldn't believe it.

"I thought it was fake," he said. "It's hit me, but it ain't hit me. I feel like he's still going to call me in a little bit, but that's not going to happen."