She called to say her other son, Botham Shem Jean, had been fatally shot in his Dallas apartment by a police officer who mistakenly thought it was her own.
Guyger was booked into the Kaufman County Jail about 7:20 p.m. Sunday, according to online records.
The footage shows a female cop crying into her phone on a walkway of the Dallas apartment block seconds before 26-year-old Botham Jean is pulled past on a trolley as medics desperately try to revive him.
Dallas police Chief U. Renee Hall told reporters on Saturday that Guyger's arrest warrant had not yet been signed yet because the Texas Rangers were still probing the new information. The department had requested a warrant on Friday.
S. Lee Merritt, who is representing the family of 26-year-old Botham Jean, said Saturday that the family isn't calling on the authorities to jump to conclusions or to deny Officer Amber Guyger her right to due process.
Officer Amber Guyger #10702 is the involved officer and has been on the department four years. Following the Dallas Police Department's "normal officer-involved shooting protocol", the Texas Rangers were brought in to conduct an independent investigation, officials said. Her bond had not yet been set.
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A lawyer for Jean's family said Saturday after a prayer vigil at a Dallas church that an arrest warrant should be issued for the officer.
"She took my life away, like my very own life", said Jean's mother, Allison.
Hall said she had spoken with Jean's sister and offered the family condolences.
This is a developing story and will be updated.
Guyger, who was in uniform, had ended her shift Thursday night and returned to what she believed was her apartment-which turned out to actually be Jean's home.
But Dallas Mayor Mike Rawlings said Saturday that he supported Chief Hall and her decision to bring in state investigators. He described Jean as an "amazing individual" and said that "if the grand jury deems necessary, this officer should have to answer for her actions in a court of law in Dallas County". Jean, who worked for PricewaterhouseCoopers, was shot once in the chest.
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"We have a lot of questions that are unanswered", Hall said.
"She's a very religious woman and her view on this was amazingly graceful and peaceful", he added.
"Somebody has to be insane not to realize that they walked into the wrong apartment", Allie Jean said.
PricewaterhouseCoopers said: "This is a bad tragedy". "But at some point, she fired her weapon, striking the victim".
He graduated in 2016 from Harding University, a private Christian school in Searcy, Arkansas, where he was a member of an a cappella group that performs spiritual songs for churches. "Botham Jean was a member of the PwC family in our Dallas office and we are simply heartbroken to hear of his death".
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Jean was an accountant at PricewaterhouseCoopers in Dallas, an worldwide company that does assurance, tax and advisory work for firms around the world.