The Minneapolis police officer that shot and killed the woman has been identified as Mohemed Noor.
Investigators are trying to locate a video of the shooting, as officers' body cameras were turned off at the time and cameras in the squad vehicle did not capture the incident, the BCA said. Damond, who was in her pajamas, went to the driver's side door to talk to the officer.
"Officer Noor extends his condolences to the family and anyone else who has been touched by this event", a lawyer for Mr Noor said.
"I just can't believe she's gone so young, and so tragically", said Sterlace.More news: Trump FBI pick says no one asked him for 'loyalty oath'
"I have numerous same questions and it is why we immediately asked for an external and independent investigation into the officer-involved shooting death", she said.
"She heard a sound in the alley so she called police and the cops showed up", Zach said.
Officials are now investigating why both officers' body cameras were off. "Investigators are attempting to determine whether any video of the incident exists", the statement added.
The woman's stepson Zach Damond has earlier taken to Facebook Live, seeking answers and condemning gun violence in the United States. Damond owned a meditation and life-coaching company, according to her personal website. He was away for a business trip when the killing took place.
For reasons not yet understood, the officer in the passenger seat fired his weapon at Damond, shooting her through the driver's side door. The station did not provide details on the nature of the complaints but said one was dismissed with no disciplinary action and the other two are pending.
Meanwhile, a vigil held for Damond draws more than 300 people.