Amber Guyger

Updated at 7:16 p.m. ET

Brandt Jean's extraordinary response to a convicted murderer — he hugged Amber Guyger as she was sentenced for killing his brother, Botham Jean — has provoked an array of reactions, from admiration to frustration. It has also deepened a national debate over regulating police use of force.

Updated at 9:26 p.m. ET

Amber Guyger, a former Dallas police officer who killed her unarmed black neighbor after stepping into his apartment and mistaking it for her own, has been sentenced to 10 years in state prison by the same jury that convicted her of murder.

"Your sentence will begin today," Judge Tammy Kemp told Guyger.

Updated at 6:22 p.m. ET

A Dallas jury has found former police Officer Amber Guyger guilty of murder for fatally shooting a neighbor who lived in the apartment directly above hers last year. She had testified that she entered Botham Jean's unit after a long day at work, thinking it was her own home and that he was an intruder.

A white former Dallas police officer who shot her black unarmed neighbor to death after, she said, mistaking his apartment for her own was convicted of murder Tuesday in a verdict that prompted tears of relief from his family and chants of "Black Lives Matter" from a crowd outside the courtroom.

A Dallas police officer testified Friday that after entering what she thought was her apartment last year, she shot the silhouetted figure inside because he was advancing on her in the dark and she feared for her life.

A white former Dallas police officer who shot and killed her unarmed black neighbor in his apartment goes on trial in Dallas on Monday.

The former officer, Amber Guyger said she entered the wrong apartment thinking it was her own, and shot 26-year-old Botham Shem Jean because she thought he was a burglar.

Jury selection is set to begin Friday for the white former Dallas police officer who shot and killed her unarmed black neighbor in his apartment last year. Amber Guyger said she entered the apartment by mistake and thought 26-year-old Botham Shem Jean was a burglar.

Dallas police officer Amber Guyger, left, shot and killed Botham Shem Jean in his apartment.
Kaufman County Sheriff's Office via REUTERS: Guyger/Facebook: Botham Shem Jean

The former Dallas police officer who fatally shot an unarmed black man in his own home told a 911 dispatcher "I thought it was my apartment" nearly 20 times as she waited for emergency responders to arrive, according to a recording of the call obtained by a Dallas TV station.

KAUFMAN COUNTY SHERIFF'S OFFICE VIA REUTERS: GUYGER/FACEBOOK: BOTHAM SHEM JEAN

Prosecutors have dismissed at least nine cases that were investigated by the former white Dallas police officer charged with murder in the fatal shooting of an unarmed black man in his own apartment, according to court records.

Dallas police officer Amber Guyger, left, shot and killed Botham Shem Jean in his apartment.
Kaufman County Sheriff's Office via REUTERS: Guyger/Facebook: Botham Shem Jean

A Dallas County grand jury on Friday indicted former Dallas police officer Amber Guyger for murder, according to county court records. Guyger shot and killed Botham Jean, an unarmed black man, in his apartment on Sept. 6.

Updated, 7:21 a.m. Tuesday

The Dallas Police Department has fired officer Amber Guyger, almost three weeks after she shot and killed her black neighbor in his apartment.