Orange County Sheriff's Office Homicide Detective Danny Garcia Pagan was one of the first responders who had to identify the victims of the Pulse Nightclub shooting. (Melissa Lyttle/For The Washington Post)

Nine body bags were laid out on gurneys when Danny Garcia Pagan arrived at the Orange County medical examiner’s office. Bag by bag, he zipped them open and looked on the faces of the dead.

Garcia Pagan, a homicide detective with the Orange County sheriff’s office, had already spent several hours interviewing witnesses to the deadliest mass shooting to strike an American city, reliving the horror that had struck a vibrant gay nightclub just before closing early Sunday. Survivors recalled being stalked by the gunman, a 29-year-old security guard who pledged allegiance to the Islamic State. They recalled being struck by bullets, lying on the floor, playing dead.

Those interviews had taken an emotional toll on Garcia Pagan. But that toll was about to get worse — and much more personal.

As he examined the bodies, he reflected on how the mostly Latino victims looked like members of his own family. Then Garcia Pagan came across a woman with purple lipstick and no name. Her personal effects revealed little about her identity.

Garcia Pagan didn’t know it at the time, but he would soon discover that, as is so often true of Latinos in central Florida, only a few degrees separated him from the lovely young woman on the stretcher, clad in her Saturday-night dress and jewelry and adorned with a flower tattoo.

49 people were killed at a nightclub in Orlando when a gunman who pledged loyalty to the Islamic State opened fire and took hostages. Here are the victims. (Victoria Walker/The Washington Post)

The rampage at the Pulse nightclub killed 49 people in addition to the gunman and left 53 others injured. Hundreds of others witnessed the slaughter, and thousands have had to absorb the loss of a colleague, a relative, a friend. The shooting is also reverberating far beyond central Florida to communities in Puerto Rico, the Dominican Republic, Mexico and other parts of Latin America.

And while the public has been stunned by the enormity of the crime, a vast network of first-responders — doctors, paramedics, victim advocates, crime scene investigators and law officers like Garcia Pagan — has had to work through the horror.

[Orlando’s Latino community hit hard by massacre at nightclub]

“Chaos is our normal,” said Garcia Pagan, 43. “We are the people behind the scenes trying to bring normalcy to the chaos for everyone else.”

Garcia Pagan had been asleep when the first call came at 4:50 a.m. Orlando police were counting bodies when Garcia Pagan arrived at the scene about an hour later.

He was dispatched to the hospital to debrief the injured. Nearly all of them had been shot or injured by shattered glass. Most, like him, were native Puerto Ricans. Many spoke no English. Most of the officers on the scene spoke no Spanish. Garcia Pagan quickly realized that he would have to interview many of the victims himself.

After 15 years in law enforcement, four of them in homicide, Garcia Pagan said he’s seen plenty of stories and talked to dozens of victims. He is usually inured to people’s sad stories, listening only for the details that can be added to a crime report, the tiny nuggets of information that could help solve a case.

As law enforcement officials in Orlando continue their investigation of the Pulse nightclub shooting, former State Department counterterrorism analyst Tricia Bacon describes the steps they take to ensure all leads are carefully explored. (Jorge Ribas,McKenna Ewen/The Washington Post)

On Sunday at the hospital, it was “just a little different,” he said. These stories were all the same: It was the last song. People by the bar were dancing, hugging, holding hands. The gunshots exploded to the rhythm of the music until people started dropping. They hid in closets, in bathrooms and beneath bodies. Someone had to die for them to live.

“It just kept coming, and you can’t go anywhere,” Garcia Pagan recalled one person saying.

“It doesn’t hit you until you see their faces. They all have the same fear,” he said. “They are afraid, even sitting there with me in the hospital, that they could still be hurt.”

[‘The guilt of being alive is heavy,’ survivor says]

After a dozen interviews, Garcia Pagan handed over the information to Orlando police, who were leading the investigation. His next stop was the morgue.

The first few identifications were easy enough. He rifled through the pockets of the bodies, found driver’s licenses. He took note of facial hair, distinctive jewelry, tattoos. Almost everyone matched up with a name from the list of the missing.

Seven of the 11 bodies that Garcia Pagan helped identify were from Kissimmee, a town known for Disney and all things “boricua,” or Puerto Rican. It’s a place where streets are named after Puerto Rican icons, where grocery stores specialize in island favorites, where people watch boxing on 50-inch TVs mounted in garages tricked out with mini-bars, dominoes tables and extra-large Puerto Rican flags.

“I had a sense of urgency to identify them quickly,” Garcia Pagan said of his fellow islanders. “I had this, you know, anxiety, I guess is the word, to make sure I got it right.”

The young woman presented one of the few mysteries. She carried no identification. She matched none of the people who had been reported missing. All he knew about her was what he saw in the bag: A pretty girl in a black dress and a large gold necklace who had two tattoos — a date of birth and a flower.

They would have to fingerprint the woman to learn who she was.

Later that day, Garcia Pagan received a frantic call from a cousin in Puerto Rico. A family friend named Yilmary was missing. They knew she had been at Pulse that night, but they had heard nothing more. Could Garcia Pagan help?

He wasn’t sure. He asked them to text him a photo. Minutes later, the image popped up on his mobile phone.

“My heart just dropped,” he said. “Holy s---, it was her.”

Yilmary “Mary” Rodriguez Solivan. In the photo, the 24-year-old was smiling, pressed cheek-to-cheek with her boyfriend’s brother, William Borges, and his friend, Jonathan Camuy. The selfie had been taken at the club, not long before the rampage.

[The lives lost in Orlando]

Rodriguez had gone to Pulse that night with Borges and Camuy, leaving her boyfriend at home. She had given birth to their second child just a few months earlier. She wanted to dance.

She had left her purse in her car.

Borges was shot twice but lived. Camuy was shot and killed. And now, Garcia Pagan had identified his mystery woman.

“Mary was a fighter,” said her aunt, Elsa Shiner. “That is why I cannot believe it. If she was in danger, I know for sure she would have run because she is thinking about her two kids and knows she has to go back home to them.”

Garcia Pagan said days like Sunday are hard to forget and even harder to talk about. Once the bullets stop flying and the scene is cleared, images persist. Many cops, he said, try to bottle it up. But some things are too hard to hide.

“One-hundred families. One hundred different families were affected by this. Most of these kids are younger cats who just wanted to have a good time. Then some complete jackass . . .”

His voice trailed off in anger. He pushed the emotion back down. There was still a job to do.

Late Sunday, Garcia Pagan visited Rodriguez’s boyfriend, who told him how to find the girl’s mother.

Then he got back in his car and drove off to knock on the mother’s door.