A gunman who "said he wanted to kill white people, especially white officers", opened fire in July 2016 in the middle of what had otherwise been a peaceful protest over police shootings.
Guyger was booked into the Kaufman County Jail on a manslaughter charge, the authorities said. A jail employee said Guyger was released on bond.
Her arrest came amid intensifying calls for the 30-year-old officer to be charged in the fatal shooting of her 26-year-old neighbor, Botham Shem Jean, on Thursday.
Jean, 26, was a member of Dallas West Church of Christ, where he taught a young adult Bible study every week. These photographs are from Jean's Facebook page.
Lawyers for Jean's family had been calling for Guyger's arrest since the shooting, saying the fact she had remained free days later showed she was getting favorable treatment. However, it's been reported she was released on $300,000 bail Sunday night. They didn't provide details.
Dallas civil rights attorney Lee Merritt had said hours earlier that based on his conversations with officials, including Hall, there was enough evidence to arrest Guyger on suspicion of manslaughter.
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"They said, 'Not necessarily, ' and that they just wanted more evidence", Merritt told The Washington Post earlier on Sunday. Co-founder Sara Mokuria said the group expects transparency in the case going forward. Many questions remain about what led the officer, who has been on the police force for four years, to shoot Jean. We have investigators trying to figure out immediately what happened, the decision to take it to the Texas Rangers, letting them move through this, figuring out what to charge her with and then having the DA take this up. "This crime was not only a shock for the Jean family, but also one that continues to astonish most sensible Americans".
According to reports, the shooting took place Thursday night at South Side Flats where Jean and Guyger lived. She reported the shooting to dispatchers and told officers who responded that she had mistaken Jean's apartment for her own. A blood sample has been drawn for alcohol and drug tests. He grew up in Saint Lucia and his mother worked for the government in the Caribbean island nation. "Would she have reacted differently?"
Harding University President Bruce McLarty shared a memory of Jean with students in chapel Friday morning. She didn't know she was in the wrong apartment until Jean was shot in the chest.
Authorities had initially held off on obtaining an arrest warrant on manslaughter charges. Perez got out of a auto and became combative with Guyger and another officer.
Meanwhile, the prime minister of Saint Lucia will be in Dallas Monday for a flag ceremony and to meet with Jean's family. 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".