Amber Guyger, 30, alternates alternately with the Dispatcher, with Jean, with himself, and finally with the answering officials.
Crying, when the dispatcher says her help is on the way, she replies, "I know, but I'm going to lose my job, I thought it was my flat."
Originally charged with manslaughter and released from the Kaufman County jail on bail of $ 300,000, a grand jury raised the charge of murder in November. Her lawyer said the shoot was a "real mistake" and a jury would convoke her.
"Stay with Me, Bud"
"You shot somebody?" The dispatcher answers.
"Yeah, I thought it was my apartment, I'm shitty, oh my god, I'm sorry," says Guyger.
"I'm in the apartment with him," she tells the dispatcher before she asks Jean, "Hey, come on, man."
She continues, "Hey, Bud Hey, Bud Hey, Bud." Come on. Oh, damn … I thought it was my apartment. "
Guyger urges the dispatcher to hurry up before saying repeatedly that she thought she was in her own apartment," I could have sworn that I parked on the third floor, "she says.  When the dispatcher asks for the gate code and assures that the Guyger police are on the way, Guyger still talks to Jean: "Hey, Bud. Hey, bud. They are coming. They are coming. They are coming. I'm sorry. "Man."
Asked where Jean was shot, Guyger answers, "He's up on the left."
"Oh my god, I'm done, I did not want that, I wanted I do not want to, I'm so sorry, "Guyger continues, telling Jean," Stay with me, Bud. "
The dispatcher says the Guyger police are almost there. Guyger curses as the realization of what she has done continues.
"I thought it was my apartment, I thought it was my apartment, Holy, I thought it was my apartment, Oh, my God, I thought it was my apartment, I'm so sorry, I'm sorry It's so. "
She asks herself, "I … I … How the hell did I get the … How did I … How did I … I'm so tired, hurry up. "
When the police arrive, she calls them and says," No, it's me, I'm not on duty, I do not have any time off, I thought they were in my apartment I thought that was my floor. "
The call ends. Jean, 26 years old and unarmed, later died in a hospital.
Lawyer: Guyger guilty of a "true mistake"
The door was a bit ajar when she tried to use her key, which has an electronic chip. When she opened the door, she saw that the inside, according to the affidavit, was almost completely dark. She described how she saw a large silhouette, and believed that there was an intruder in her apartment, and drew her weapon.
She gave verbal orders, but Jean, who was in his own house, ignored her and Guyger shot two times and struck her once in the torso, the affidavit said.
Guyger called 911 and started to give Jean first aid. She switched on the phone as she phoned 911. Only when she was asked for her address, she realized that she was in the wrong apartment, she told the police.
When Dallas County Attorney Faith Johnson introduced the case of a grand jury manslaughter, the jury downgraded the charge of murder. Johnson stated that they thought Guyger's actions were "knowing" or intended to leave Guyger free on their original bail.
"This is a terrible tragedy that results from a true mistake," said Robert Rogers, Guyger's lawyer. "We are confident that a dispassionate jury in a fair forum will objectively apply the law to the facts and declare Amber not guilty."
Jean's mother, Allison Jean, applauded the improved indictment and said Guyger had "done a tremendous evil son."
"He did not deserve it," she said. "He was sitting in his own apartment, feeling safe and hurt when she came in and killed him."
Allison Jean said she hoped a guilty verdict and appropriate sentence would encourage Guyger to reflect on what she did, the pain she caused.
In October, Jean's parents filed a lawsuit against Guyger and the city, claiming that Guyger had used excessive force. The trial of the former police officer is due to begin in September.
Jason Hanna of CNN contributed to this report.