THE white female police officer who gunned down a black accountant after allegedly mistaking his apartment for her own has been charged with manslaughter.

The Dallas Police Department named the officer as Amber Guyger, who has worked for four years on the Southeast Patrol Division.

The development came as video emerged of the shooting of Botham Jean, 26, who later died in hospital.

The footage shows Guyger, who is wearing her uniform after returning from her shift, crying into her phone on a walkway of the Dallas apartment block as Mr Jean is pushed past on a trolley by paramedics.

Guyger called dispatch to report that she had shot a man, and she later told the officers who responded that she believed the victim’s apartment was her own when she entered.

Allison Jean, the victim’s mother, wondered whether race was a factor.

“I didn’t know she was white until now. If it was a white man would it have been different? Would she have reacted differently?” Jean asked on Friday in footage broadcast by Dallas’ NBC affiliate, KXAS.

Dallas’ police chief, U Renee Hall acknowledged that many questions remain about the shooting and asked the public to give investigators enough time to get to the answers.

Botham Jean, who was born on the island of St Lucia, attended Harding University in Arkansas and, after graduating in 2016, he had been living and working in Dallas at accounting and consulting firm PwC. The private school said he often led campus worship services while he was a student.

Family and friends described Jean as a devout Christian and a talented singer. His uncle Ignatius Jean said the slaying left relatives devastated and looking for answers.