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Dallas Police Department fires officer over manslaughter charges

NBC News logo NBC News 9/24/2018 Corky Siemaszko

Image: Amber GuygerOfficer Amber Guyger appears in a booking photo provided by the Kaufman County Sheriff's Office, on Sept. 10, 2018. © Provided by NBCU News Group, a division of NBCUniversal Media LLC Image: Amber GuygerOfficer Amber Guyger appears in a booking photo provided by the Kaufman County Sheriff's Office, on Sept. 10, 2018. The Dallas Police Department on Monday fired an officer who barged into the wrong apartment in her building and killed a man who was inside.

The dismissal of Amber Guyger was announced by Dallas Police Chief ReneƩ Hall on Twitter.

This Feb. 27, 2014, portrait provided by Harding University in Searcy, Ark., shows Botham Jean. Authorities said Friday, Sept. 7, 2018, that a Dallas police officer returning home from work shot and killed Jean, a neighbor, after she said she mistook his apartment for her own. The officer called dispatch to report that she had shot the man Thursday night, police said. (Jeff Montgomery/Harding University via AP) © Jeff Montgomery/Harding University/AP Photo This Feb. 27, 2014, portrait provided by Harding University in Searcy, Ark., shows Botham Jean. Authorities said Friday, Sept. 7, 2018, that a Dallas police officer returning home from work shot and killed Jean, a neighbor, after she said she mistook his apartment for her own. The officer called dispatch to report that she had shot the man Thursday night, police said. (Jeff Montgomery/Harding University via AP) Guyger, who was hired in November 2013, was fired after an Internal Affairs investigation concluded that the officer "engaged in adverse conduct when she was arrested for Manslaughter," the chief's Tweet read.

Hall's tweet shed no new light on the death of Botham Jean, a 26-year-old native of the Caribbean island of St. Lucia.

It remains unclear why the officer opened fire or what she may have been doing before she returned to her building after working a full shift. But Hall said earlier that a blood sample was drawn at her request to test the officer's drug and alcohol levels and "we are in the process of obtaining a warrant based on the circumstances."

Guyger, 30, was arrested earlier this month on suspicion of manslaughter.

This is a developing story, check back for updates.

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