Two weeks ago, reports emerged about a shooting on the set of the film Rust.
As details started trickling in, it was confirmed that a prop gun had been discharged, killing the film's director of photography, Halyna Hutchins, and wounding the movie's director, Joel Souza.
It was later announced that the producer and star of the film, Alec Baldwin, was the one who fired the gun.
In the days since, further details have come out about the incident, the prop gun, and those involved.
Here's everything we know about the fatal shooting on the set of Rust.
What happened?
On October 21, Alec Baldwin was in character, rehearsing a scene for his new Western film, Rust, that involved him shooting a gun on set.
The crew had just returned from lunch, and according to an affidavit obtained by Insider, assistant director David Halls told police that he did not check all the rounds in the barrel of the prop gun when he returned to set.
Halls told police that when the film's armourer Hannah Gutierrez-Reed "showed him" the prop gun used by Baldwin, "before continuing rehearsal, he could only remember seeing three rounds".
Halls "advised he should have checked all of them, but didn't and couldn't recall" if Gutierrez-Reed "spun the drum" of the gun, before handing it to Baldwin and yelling "cold gun!" - an industry term meaning a weapon is not loaded with ammunition, including blanks.
When the actor fired the prop gun, he struck two people: Halyna Hutchins and Joel Souza.
Halyna Hutchins, 42, the film's director of photography, was shot in the chest and flown to the University of New Mexico Hospital in Albuquerque, where she later died.
Joel Souza, 48, the film's director, was shot in the shoulder and wounded; transported by ambulance to Christus St. Vincent Regional Medical Center to be treated for his injuries. He was later released.
Police have since shared Hutchins was sitting in front of Souza watching the rehearsal play out when they were struck, and both of them were hit with the same bullet.
In the affidavit, Souza said he remembered Hutchins "complaining about her stomach and grabbing her midsection" before she "began to stumble backwards and she was assisted to the ground."
He also "explained that he was bleeding from his shoulder and he could see blood on Halyna," while camera operator Reid Russell "remembered Joel having blood on his person and [Hutchins] speaking and saying she couldn't feel her legs."
Souza also shared the incident wasn't filmed, because they were working on setting up the camera for the scene.
According to the affidavit, the assistant director who handed Baldwin the gun "did not know live rounds were in the prop-gun", as it was "set up" on the tray by Gutierrez-Reed.
In a news conference on Wednesday reported by The New York Times, investigators confirmed that a lead projectile was fired from the revolver.
They also found around 500 rounds of ammunition on set including blanks, dummy rounds, and what they suspect to be live ammunition.
The sheriff declined to comment on how the live ammunition ended up on a film set.
What is a prop gun?
The term "prop gun" refers to nonfunctioning guns, cap guns and fake guns made of wood, plastic or rubber. The term can also refer to real guns modified to fire blank cartridges.
When used in films, blank cartridges are filled with gunpowder and lack the deadly bullet - which is usually replaced with cotton or paper wadding.
The force of firing a prop gun is just as intense as a real gun, providing the shooter with real recoil. At close range, they can cause injury or death.
Shortly after the incident on the set of Rust, investigators confirmed the gun used was in fact a "prop firearm". It has since been announced it was a .45 Long Colt revolver filled with a lead projectile.
Accidental fatal gunshots on movie sets are rare, but they have happened before.
In 1993, Brandon Lee, the son of Bruce and Linda Lee, was killed by a prop gun wound on the set of The Crow.
The prop gun that killed him was not properly checked before the fatal incident, meaning the projectile tip of a dummy round was accidentally lodged in a gun chamber and then propelled out of the gun by a blank cartridge, shooting Lee in the abdomen.
Listen to The Quicky, Mamamia's daily news podcast. In this episode, we find out just how dangerous a movie set really is. Post continues after audio.
How has Alec Baldwin responded?
Since the incident, Alec Baldwin has released a statement and been in contact with Halyna Hutchins' husband, Matthew Hutchins.
"There are no words to convey my shock and sadness regarding the tragic accident that took the life of Halyna Hutchins, a wife, mother and deeply admired colleague of ours," the actor wrote in a statement on last Friday.
"I'm fully cooperating with the police investigation to address how this tragedy occurred and I am in touch with her husband, offering my support to him and his family.
"My heart is broken for her husband, their son, and all who knew and loved Halyna."
Her husband Matthew shared a statement with Insider last Friday.
"I don't think there are words to communicate the situation," he said.
"I am not going to be able to comment about the facts or the process of what we're going through right now, but I appreciate that everyone has been very sympathetic.
"I think that we will need a little bit of time before we can really encapsulate her life in a way that is easy to communicate."
On Saturday, he asked for privacy and directed financial support to AFI, to establish a scholarship in his wife's name.
In a statement, Hutchins' agency, Innovative Artists, referred to the 42-year-old as a "ray of light".
"Halyna Hutchins was a ray of light," the statement read.
"Always smiling, always hopeful. She decided early on she would take the craft of cinematography by storm and the last couple of years proved she was well on her way.
"Her talent was immense, only surpassed by the love she had for her family.
"All those in her orbit knew what was coming; a star director of photography, who would be a force to be reckoned with."
As the investigation into the incident continues, the film set has been shut down and production has been paused indefinitely.
"The entire cast and crew has been absolutely devastated by today's tragedy, and we send our deepest condolences to Halyna's family and loved ones," the film's production company, Rust Movie Productions LLC, said in a statement.
"We have halted production on the film for an undetermined period of time and are fully cooperating with the Santa Fe Police Department's investigation.
"We will be providing counseling services to everyone connected to the film as we work to process this awful event."
This article was originally published on October 23 and has been updated with new information.
— With AAP.
Feature Image: Getty.