previous cop on trial because that neighbor"s death 01:53 A previous Dallas officer who claims she fatally shooting an unarmed black man in his own house after mistaking his apartment because that her own made a series of "unreasonable errors" and also worried an ext about just how the event would affect her than about the man she shot, a prosecutor claimed in opening statements of she murder attempt Monday.

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previous Dallas police officer Amber Guyger viewed Monday, September 23, 2019. AP

Amber Guyger, who is white, is stand trial for the killing of 26-year-old Botham Jean critical year.

Guyger to be returning come the Dallas apartment facility where she stayed in an apartment on a various floor native Jean after functioning a 13-and-a-half-hour transition September 6, 2018, a prosecutor said. Guyger was off-duty but still in uniform as soon as the shooting happened. She called investigators that she parked on the fourth floor of she apartment complex"s garage — quite than the 3rd floor, wherein she lived — and also found the apartment"s door ajar.

Jean, an accountant from the Caribbean nation of St. Lucia, "was act no damage to anyone, which was his way," Dallas ar Assistant ar Attorney Jason Hermus stated in an opening statement. He provided that Jean remained in his life room eating a key of vanilla ice cream when Guyger gotten in the apartment, which was one floor directly over her apartment.

Hermus claimed Guyger referred to as 911 after shooting Jean, but on the call showed up to be much more worried around herself than around the fatally wounded man. On the call, Guyger have the right to be heard saying she shot a man due to the fact that she thought he remained in her apartment, and repeatedly claims she"s walking to lose her job.

"She is as concerned or more concerned around how this is walk to issue her than this bad guy on the floor next to her," Hermus said.

The case has attractive intense national scrutiny because that its strange circumstances and also as one in a chain of shootings the black males by white police officers. Guyger to be fired after Jean"s death.

Lawyers for Guyger controversy she fired in self-defense based on the mistaken id that she remained in her own apartment and also Jean to be a burglar.

But speaking Monday, Hermus claimed Guyger missed obvious signs that the apartment was not hers. Holding increase a red mat Jean kept outside his door, he stated Guyger didn"t have actually a mat in prior of her apartment. He also said Guyger retained a large table in her residence that would have been instantly visible native the former door, which Jean did no have.

"She falls short to recognize every one of these things that she"s conscious of and that failure price his life," Hermus said.

Amber Guyger, right, and also Botham Jean. AP

A defense attorney argued that Guyger made a failure he dubbed awful and also tragic, however innocent. Robert Rogers said the apartment facility was "confusing" and also that it to be not unexplained for residents to mistakenly try and go into others" units. He said Guyger was exhausted and also on "auto pilot" after a long change at work and also didn"t notice the apartment was not hers until after she opened fire, fearing for her life because Jean was coming in the direction of her.

"It starts come dawn on her as she approached Mr. Jean"s human body what a horrible, dreadful mistake she has actually just made," Rogers said.

Rogers claimed Guyger instantly called for EMS and only left the apartment to display responding police officers where it to be located. He stated Guyger, who has actually pleaded no guilty, would certainly take the stand in her own defense.

The job of the shooting, Guyger had been exchanging sexually explicit message messages with her Dallas Police department partner, young name Rivera, v whom she had actually been romantically affiliated for about a year, follow to prosecutors. During pretrial proceedings, prosecutors and also defense attorneys sparred end whether those messages must be entered into evidence.

Guyger had been top top the phone v Rivera minutes prior to she fatally shooting Jean and also texted him shortly afterward, Hermus said. Those messages were later deleted native Guyger"s phone, the said.

Taking the stand Monday, Rivera stated he began a romantic relationship with Guyger in 2017. He said nothing seemed out the the ordinary about Guyger the job of the shooting. The pair speak on the phone prior to the shooting around burglary suspects they arrested earlier that day, yet Rivera couldn"t recall what rather they speak about. He claimed their contact lasted about 16 minutes.

Rivera admitted that he deleted text messages he exchanged v Guyger ~ above the day of the shooting from his phone.

Three job after the shooting, Guyger was arrested for manslaughter. She was consequently fired native the Dallas Police Department and charged by a cool jury.

The trial jury will decide whether the 31-year-old committed murder, a lesser offense such together manslaughter or criminally negligent homicide or no crime at all.

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The outcome might hang on whether the jury believes the Guyger"s mistake was reasonable, according to legal experts.