It started at a holiday party — perhaps with a slight or a testy exchange, something that prompted Syed Rizwan Farook to storm off angrily.
It ended in a bloodbath with 14 people dead and 17 more wounded — the deadliest mass shooting in the United States since Sandy Hook.
At its center, a couple, Farook and Tashfeen Malik.
Dressed in black, carrying semi-automatic rifles, police say they unleashed a massacre Wednesday at the Inland Regional Center, a facility for the developmentally disabled in San Bernardino, California.
That was their first brazen act. Then they led police on a chase. Farook fired while Malik drove.
They died in a hail of bullets when confronted by 21 officers.
Now comes the challenging part: What was their motive? Could it just have been anger at a party? The level of attention, the amount of firepower, suggests it was something much more meticulously planned.
Authorities don’t yet know.
Nor do they know of any interaction Farook and Malik, who were husband and wife, had in the past with police. And neither of them were known to the FBI or on a list of potentially radicalized people, law enforcement officials told CNN.
The mass shooting
It was around 11 a.m. (2 p.m. ET) when Farook and Malik opened fire.
A text message landed in Terry Pettit’s phone from his daughter, who was inside Inland Regional.
“Shooting at my work. People shot,” she wrote. “Pray for us. I am locked in an office.”
Denise Peraza was also inside the center when she was shot in the back. She called her sister Stephanie Baldwin, thinking it might be time to say goodbye.
“As soon as the gunfire started, everyone dropped to the floor and they were underneath desks, and she was trying to shield herself with a chair, along with a man next to her,” Baldwin told CNN affiliate KABC. “Then, all of a sudden, she said she just felt (the bullet) going through her back.”
“I just want to tell you that I love you,” Peraza told Stephanie Baldwin over the phone through tears.
Peraza survived. She is in a hospital and is expected to recover.
Police have not released the names of those who died.
Within minutes, officers stormed the building searching for an active shooter. They counted the dead — and shuttled the wounded out to triage.
“We had to come out with our hands up and be escorted across the street to the golf course,” a woman who works at the center told KCAL/KCBS.
“We stood there for hours, hours witnessing clothing of deceased ones on the street, people crying, co-workers crying, us wanting to get to our children.”
SUV shootout
But Farook and Malik slipped away in a black SUV.
Not for long. Acting on information that quickly pointed police to Farook, they went to his home in Redlands with a search warrant.
A black SUV drove by them. Slowly at first, then it sped away.
A police car took up pursuit, as the SUV raced back in the direction of San Bernardino. While Malik drove, Farook opened fire out of the vehicle.
Some 21 officers returned fire. When the SUV came to a halt, it was riddled with bullet holes. The couple inside was dead; their bodies found dressed in “assault-style clothing,” San Bernardino Police Chief Jarrod Burguan said. “Dark kind of tactical gear.”
One officer was wounded, but his injuries were not life-threatening, Burguan said.
In the chaos, police encountered a third person who was running away.
“We do not know if they were involved,” Burguan said. “We have that person detained.”
But they feel confident that there were only two shooters — Farook and Malik.
This is notable given that, while there have been many mass shootings, it’s extremely rare when they involve more than one shooter. Only two of the 28 deadliest shootings since 1949 in the United States have had more than one shooter.
Guns galore
The husband and wife didn’t leave behind a note at Inland Regional. But they did stash three explosive devices — rigged to a remote-controlled toy car — that didn’t go off.
And in their SUV, authorities found wwo .223-caliber rifles along with two pistols.
They were legally purchased, police said.
Two handguns were traced back to Farook, an official said; he bought them three to four years ago.
Someone else bought the two rifles, possibly a former roommate, also three to four years ago. That person isn’t believed to have anything to do with the shootings, the official said.
“I think that what we have seen and how they were equipped, there had to be some kind of planning in this,” Burguan said.
Explosive devices
Back at Inland Regional, there was still danger to be dealt with even though the shooters were gone. Three explosives the had been left behind.
They were “pipe-bomb-type design,” Burguan said. Police secured them and remotely detonated them.
The explosives had been rigged to a remote control for a toy car, an official said. That remote was found inside the SUV. And in the vehicle was another pipe-like device, but it was not an explosive, Burguan said.
Authorities also converged on Farook’s residence in Redlands, going in and out in waves throughout the day and night. Law enforcement officers were still on scene Thursday morning, trying to collect evidence that might explain the carnage.
Meanwhile, the lives of the loved ones of those slain in the rampage — as well as the wounded and those on-site who were physically but not psychologically unharmed — will never be the same.
“The desperation and despair that they feel, we feel that for them also,” San Bernardino Mayor Carey Davis told CNN on Thursday, after meeting with relatives of those killed.
“I think that they need to rely upon their faith, they need to draw close to their families and recognize what’s the priority, and that should be their families.”
Brother-in-law shocked
Farook, an American citizen, was an environmental health specialist with the San Bernardino County health department, which was holding the holiday party at Inland Regional.
He had worked there for five years.
In an online profile, he described himself as a “Muslim Male living in USA/California/riverside” and his family as “Religious but modern.”
He “enjoys working on vintage and modern cars, reads religious books, enjoys eating out sometimes. Enjoys travelling and just hanging out in the back yard doing target practice with his younger sister and friends,” his profile read.
Farook’s brother-in-law Farhan Khan said he was “devastated” by the news.
“I have no idea why he would he do something like this. I have absolutely no idea. I am in shock myself,” Khan said. “I don’t have words to express how sad and how devastated I am.”
Khan said he last talked to Farook a week ago. Farook’s family had tried to reach him all day Wednesday but could not. Hussam Ayloush, the head of the Southern California chapter of the Council of American-Islamic Relations, said Farook and his wife had dropped off their 6-month-old girl with her grandmother and claimed they were going to a doctor’s appointment before the massacre.
“There’s absolutely nothing that could justify (this shooting),” Ayloush told reporters. “And we stand in mourning and sadness for what happened.”
