This Vox article concludes:

What we don’t know

  The shooter’s motive

A safe bet is that the shooter’s motive was rather an incoherent motive of broad revenge against societal incoherence and therefore lack of accountability, agency and warrant that socially delimited human ecologies would otherwise afford.

VOX, Marjory Stoneman Douglas High School shooting in Florida: what we know:

At least 17 people are dead. The 19-year-old suspect is in custody.

Parents wait for news after a shooting at Marjory Stoneman Douglas High School in Parkland, Florida. Joel Auerbach

A shooting at Marjory Stoneman Douglas High School in Parkland, Florida, has left at least 17 people dead. Students and adults are among the victims.

A 19-year-old male suspect, Nikolas Cruz, has been charged with 17 counts of premeditated murder. Cruz, a former student at Stoneman Douglas, took an Uber to the school Wednesday afternoon. He was armed with an AR-15 rifle, law enforcement officials said, which he used to carry out his rampage. He fled the scene on foot, blending in with the rush of students pouring from the building. The massacre unfolded in less than 10 minutes, according to the timeline released by the Broward County Sheriff’s office.

“That should not happen in Parkland. It should not happen anywhere in this country,” Broward County Public Schools superintendent Robert Runcie said on Wednesday night. “We have got to find a way for this to stop.”

The investigation is still in its early stages. Details could change with more information. Here’s what we know — and don’t.

What we know

- Around 2:30 pm on Wednesday, just before class dismissal, the fire alarm went off, and shooting began. A law enforcement official told told CBS News it was believed the suspect pulled the fire alarm before the shooting rampage.

- At least 17 people were killed in the school shooting. At least 14 others were wounded, with five individuals sustaining life-threatening injuries. Teenagers and adults are among the victims, according to the Broward County Sheriff’s Office.

- The victims we know of so far: Jaime Guttenberg, Martin Duque, Alyssa Alhadeff, Aaron Feis, Gina Montalto, Nicholas Dworet, Luke Hoyer, Carmen Schentrup, Meadow Pollack, Joaquin Oliver, Alaina Petty, Cara Loughran, Helena Ramsey, Alex Schachter, Chris Hixon, Scott Beigel, and Peter Wang. The Miami Herald has the full list with photos and more information.

- The lone suspect is 19-year-old Nikolas Cruz, according to the Broward County Sheriff’s Office. He was taken into custody off school property about an hour after the shooting, the sheriff said.

- Cruz confessed to the shooting, according to a sheriff’s report. He’s been charged with 17 counts of premeditated murder.

- Cruz is a former Marjory Stoneman Douglas High School student who had been expelled for disciplinary issues, the sheriff said, although he did not say why. Cruz is currently enrolled in Broward County Public Schools, superintendent Robert Runcie said at a press conference on Wednesday.

- Former and current peers described Cruz as troubled. According to the Associated Press, Cruz “threatened and harassed peers, talked about killing animals, posed with guns in disturbing photos on social media, and bragged about target practice in his backyard with a pellet gun.” He reportedly received treatment at a mental health clinic before.

- One student told the Associated Press that Cruz was abusive to his ex-girlfriend and was expelled over a fight with her new boyfriend.

- Some media reports claim that Cruz was linked to a white supremacist group. But police have not yet confirmed the link, Sheriff Israel said.

- Cruz was armed with an AR-15 rifle and multiple magazines, according to the sheriff. Cruz, who was reportedly fascinated by guns, reportedly bought the rifle legally.

- Cruz took an Uber to the school grounds on Wednesday afternoon, arriving shortly before 2:20 pm. He entered the stairwell of one of the school buildings, carrying a soft black case containing a rifle. He opened fire in certain classrooms on one floor, the sheriff said on Thursday. Authorities are investigating whether he targeted a specific area.

- The suspect abandoned his weapon on the third floor of the building, exiting the building and blending in with the others fleeing school grounds. He then went to a nearby Walmart and bought a drink at a Subway store inside. He briefly visited a McDonald’s, then left on foot and was detained about 40 minutes later, Sheriff Israel said.

- Marjory Stoneman Douglas High School has around 3,000 students. It’s located in Parkland, Florida, north of Miami and Fort Lauderdale. Classes are canceled at the school for the remainder of the week.

       
        A map of the Florida high school shooting. Javier Zarracina/Vox

President Donald Trump signed a proclamation in honor of the shooting victims and gave a public statement on Thursday morning about the shooting. “Today we mourn for all of those who lost their lives,” he said. “We comfort the grieving and the wounded. And we hurt for the entire community of Parkland, Florida, that is now in shock and pain and searching for answers.” He did not mention the issue of guns.

There have been at least 16 other school shootings in the US in 2018, based on data from Everytown for Gun Safety, a group that advocates for gun control. Everytown defines a school shooting as “any time a firearm discharges a live round inside a school building or on a school campus or grounds, as documented by the press and, when necessary, confirmed through further inquiries with law enforcement or school officials.

The Florida shooting is the deadliest school shooting in five years, according to the Associated Press.

What we don’t know

  The shooter’s motive