Updated at 8:30 p.m.: Revised to reflect the department's official release of the officer's name.

The officer who killed a man in his apartment Thursday after she apparently mistook it for her own home also shot a suspect during an arrest in 2017.

Amber Guyger

Amber Guyger, 30, who has been with the department for almost five years, was not indicted in the 2017 shooting of the suspect who had taken her Taser from her during a struggle.

She is expected to face a manslaughter charge for killing 26-year-old Botham Jean on Thursday, but a warrant for her arrest had not been issued Saturday.

“She is devastated," said a Dallas police officer close to Guyger who spoke on condition of anonymity because he was not authorized to speak publicly. "She is so, so sorry for this family.”

Guyger had moved into the South Side Flats complex about a month earlier and had never met Jean, the officer said.

Her attorney declined to comment.

Botham Shem Jean

Guyger started on patrol in the department's southeast division and was later selected as the sole woman on a elite crime response team of about 10 officers who make high-risk arrests in the division's crime hot spots.

In 2017, Guyger shot 47-year-old Uvaldo Perez, who had wrestled a Taser away from her.

Another officer had been in a Pleasant Grove neighborhood looking for a woman who had a warrant out for her arrest. When the officer thought he saw the woman in a car with two men in the 8300 block of Reva Street, the officer asked for backup from Guyger and another officer, according to an affidavit.

One of the officers was trying to search Perez when he became combative, the affidavit said. Guyger deployed her Taser before Perez was able to take it from her.

After Perez had the Taser, Guyger fired her gun once, striking him in the abdomen, the affidavit said. Neither Guyger nor the other officers were injured in the 2017 shooting.

Police arrested Perez on a charge of taking a weapon from an officer, as well as charges for possession of methamphetamine, marijuana and violating his parole.

In February 2018, Perez signed a plea agreement for the charge of taking an officer's weapon and was sentenced to two years in prison.

Thursday's shooting occurred after Guyger arrived at the South Side Flats in her uniform after working a full shift, police said.

Dallas Police Association President Mike Mata said Guyger "is a young dedicated officer who has done an amazing job in her short time with the Dallas Police Department."

The department officially named Guyger as the shooter late Saturday, hours after The Dallas Morning News had identified her. Dallas Police Chief U. Renee Hall had initially said the department wouldn't confirm the officer's name until she has been formally charged with a crime.

Amber Guyger (Facebook)

"Our policy is, and I want us to make sure we're as transparent as possible — we wouldn't release any other suspect's name until they are charged," Hall said.

In other officer-involved shootings, Dallas police have promptly identified the officers involved. But Hall said this situation “is not an officer-involved shooting, this is a shooting involving an off-duty officer.”

The Texas Rangers are leading the investigation into the shooting, and a spokesman said no further information was available Saturday.

Staff writer Jennifer Emily and Tristan Hallman contributed to this report.