The police officer who shot an Indigenous teenager three times, killing him, has been sacked by the Northern Territory Police Force.

Zachary Rolfe shot Kumanjayi Walker, 19, in the remote community of Yuendumu on November 9, 2019.

On Tuesday NT Police confirmed that Rolfe had been fired.

"A 31-year-old male police officer has been dismissed from the Northern Territory Police Force effective 4th April 2023," it said in a statement.

"The officer was dismissed under section 78 of the Police Administration Act 1978 due to serious breaches of discipline during their policing career."

The shooting death sparked nationwide protests calling for justice and reforms.

Rolfe was found not guilty at trial of murdering Mr Walker.

During a coronial inquest into Mr Walker's death it emerged that Rolfe had a history of violence and racism.

The inquest heard the tactics used to arrest Mr Walker were "unsound and unhelpful".

Rolfe fought calls for him to give evidence at the inquest before writing a long open letter making excuses for his racist comments about Indigenous people and attempting to blame "several maligned cops talking badly" about him for facts that emerged during the investigation.

He then fled the country.

Lawyers representing the NT Police said Rolfe was attempting to intimidate witnesses at the inquest and pervert the course of justice.

The NT Supreme Court ordered Rolfe to answer questions at the inquest. The now ex-officer's appeal against this ruling will be heard 11 April.

It is also expected that Rolfe will appeal his dismissal from the NT Police.