Investigations into the tragedy on the set of Rust's progress and new details complicate production. Investigators are advancing investigations to determine why the pistol Alec Baldwin used on the set of Rust was loaded with a real bullet that killed cinematographer Halyna Hutchins and wounded the film's director, Joel Souza. And the findings revealed severe flaws in the security measures for handling this type of device. According to a new report, the first thing that alarmed detectives were that the gun Hutchins killed had been used by team members off-set "for fun," according to a new report. The weapon may even have been loaded with live bullets when used for what was essentially target practice. Multiple sources related to the film's production told TMZ that the gun was fired in after-hours meetings, which could explain how live ammunition ended up in the gun's chamber. Another source on the set told the American media that when the police arrived, they found live ammunition and blank cartridges stored in the same area, where the fatal confusion could have occurred. Before Alec Baldwin pulled the trigger, fatally shooting cinematographer Halyna Hutchins, the gun passed through the hands of two other people on set: the chief of arms and an assistant director. According to the official statement, Chief of Arms Hannah Gutiérrez had placed three pistols for use in the film in a gray car that, due to pandemic restrictions, was kept outside a church-like building where the western was being shot. "Rust" in New Mexico. Assistant director Dave Halls picked one up and brought it to Baldwin. "Cold pistol," Halls shouted, indicating that it contained no real bullets. Police rushed to the scene after team members called 911, describing a chaotic scene in which two people were hit by a prop pistol shot during a rehearsal. "We need immediate help," said a woman who identified herself as a script supervisor in a recording of the call obtained by the Associated Press. When Deputy Sheriff Nicholas LeFleur arrived, he discovered that Hutchins had been shot in the chest and Souza in the shoulder. Hutchins was airlifted to a hospital, where she died; Souza was transported by land and later discharged. Baldwin, who was wearing Western-style clothing during the scene, changed into an outfit and handed his suit over to investigators. "These clothes appear to have bloodstains on them," the affidavit reads. In the days leading up to the deadly incident, there were worrisome signs of safety on set. Two team members told the Los Angeles Times that Baldwin's doppelganger had fired twice on Oct. 16 with a gun that he had been told was "cold." Hours before Thursday's shoot, several crew members walked out of the production in protest at what they saw as poor conditions and unpaid work, the Times reported. Bill Davis, a veteran set gunsmith, explained that A live bullet most likely killed hutchins. The blanks fire plugs of wax that dissolve from the heat of the shot and could not penetrate a bone or internal organ. Rule number 1 for gunsmiths, he said, is never to allow live ammunition on a set. "It's basic," he said. "How did that live ammunition get on set? There should be no live ammunition on a movie set, ever. It is not a can; it is a must". The chief of arms, who has not yet spoken publicly, is at the center of the investigations. It's just that weeks before the tragedy, she had admitted that she wasn't sure she was ready for work. "I was on the verge of not taking the job because I wasn't sure I was ready, but doing it, everything went very well," Gutierrez-Reed had declared in an interview on the Voces del Oest podcast last month. He also admitted on the podcast that loading blank rounds into a gun scared him the most because he didn't know how to do it and had asked his father, legendary gunsmith Thell Reed, to help him overcome his fear. Mike Lubke, a fight choreographer for film and theater, based in St. Paul, Minnesota, said staging the shootings in a cramped indoor setting - like the building on the set where Hutchins was killed - requires extra care. He said it is essential to have a few team members as possible in the room. The team must ensure that no one is on the firing line. And they must carefully choreograph the weapon's movement before and after firing, because sometimes actors' trigger fingers slip prematurely, and sometimes, especially with blank bullets, the discharge can be delayed. If the camera doesn't have to move, even the camera operator may be elsewhere. "I admit that you can't always optimize the situation," he says. "There is always some give and take." Lubke also pointed out that a gunsmith can modify guns to accept blank rounds but not live rounds. Still, productions don't always take that hassle and expense. Alec Baldwin said after the episode that he "cannot find words" to express his sadness for the accident in which the cinematographer of the film he was shooting died when the actor fired a prop pistol that he did not know was loaded. "There are no words to express my sadness and shock at the tragic accident that took the life of Halyna Hutchins, a woman, mother, and partner deeply admired by all of us. However, I am cooperating with the investigation to find out how this tragedy occurred", said the actor on his Twitter profile. The interpreter, who also injured the director of the film, Joel Souza, added that he is in contact with the husband of the mortal victim. "My heart is broken for her husband, for her son, and for all those who knew and loved Halyna," Held.