Oct. 1, 2019, 10:46 AM CDT
By Erik Ortiz
Amber  Guyger was found guilty of murder on Tuesday for fatally shooting her  neighbor, Botham Jean, after thinking he was an intruder when she  mistakenly entered his apartment.
She faces a maximum of life in prison.
The  jury was tasked with deciding whether or not Guyger, 31, acted  reasonably when she used deadly force, and if the prosecution had proven  beyond a reasonable doubt that she intentionally killed Jean or if a  lesser charge of manslaughter, which involves reckless conduct, was  warranted.
Deliberations began Monday afternoon after a week-long trial, which included the playing of the 911 call that Guyger made after shooting Jean and dramatic 
bodycam video from officers who responded to the scene.
Guyger  was off duty but in uniform when she shot twice at Jean on Sept. 6,  2018, just before 10 p.m., striking him in the chest. She had worked a  13-1/2-hour shift on the Dallas Police Department's crime response team  that day and parked on the fourth floor of the complex's garage.
She  lived on the third floor, and Jean, a 26-year-old accountant and native  of the island nation of St. Lucia, lived directly above her. The two  did not know one another.
Prosecutors said  Jean was watching television and eating ice cream in his living room  when Guyger burst inside, likely scaring him. The trajectory of the  bullet showed that he was either getting up from his couch or cowering  when Guyger fired her service weapon, they added.
The  fatal shooting, which has led to one of the most anticipated murder  trials in Dallas in decades, became a flashpoint on issues of police use  of force and racial bias. Guyger is white and Jean was black, and the  Jean family has questioned whether Guyger would have shot him if he were  a different race.
Testifying in her own  defense last week, Guyger told jurors that she was scared for her life  when she entered an apartment that she thought was hers and the man  inside began coming toward her and yelling, "Hey! Hey! Hey!"
I never wanted to take an innocent person's life. I'm so sorry," Guyger  said on the stand. "This is not about hate — it's about being scared."
Guyger  admitted to giving Jean minimal life-saving aid because she had only  one hand free while she called 911 and her state of mind was frantic.
Guyger,  who was on the Dallas police force for more than four years, was fired  from her job following the shooting. Toxicology results presented at  trial showed she was not intoxicated during the shooting.
The  defense brought on other tenants from the same apartment complex who  testified that they also had parked on a different floor and gone to the  wrong unit by mistake.
Guyger's attorneys  also downplayed that she had been sharing sexually explicit text  messages with her work partner and was on the phone with him just before  the shooting, which was 
revealed during the opening of the trial.
Prosecutors  used those messages to make the case that Guyger was not as fatigued  that day as the defense had claimed, and that Guyger intended to see her  partner later that night.
They also said  Guyger was at fault for missing several clues that she was on the wrong  floor and went to the wrong apartment, including a red doormat that  Jean's apartment had and hers did not.