The officer who was cleared of murdering Chris Kaba now faces a gross misconduct disciplinary over the shooting.
Following a review by the Independent Office of Police Conduct (IOPC), the officer has been told he must appear before a hearing and could be sacked.
The sergeant was found not guilty after a trial at the Old Bailey in October last year.
However, he now faces the prospect of losing his livelihood over the shooting because disciplinary offences are based on the civil test, which states that an honest but mistaken belief must also be "reasonable".
Chris Kaba was shot once in the head in September 2022PAKaba was shot by the police officer after trying to ram his way past police cars in Streatham, south-east London, in September 2022.
Following the trial, it could be reported that Kaba was a core member of The 67, one of London’s most dangerous gangs and was accused of being involved in two shootings in the six days before he was killed.
There were claims that the officer was left with a bounty on his head after his trial, and questions were raised as to whether he should have been prosecuted.
Prosecutors had made the argument during the trial that the officer had acted out of "fear, anger or frustration."
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However, the defence had accepted the argument that he had followed his training to the letter and had fired because he genuinely believed the lives of his colleagues were in danger.
Following the trial, new rules giving anonymity to firearms officers accused of murder were announced by Home Secretary Yvette Cooper. However, head of the charity Inquest Deborah Coles has warned the move puts police above the scrutiny faced by the rest of the public.
Coles said: "Introducing a presumption of anonymity for firearms officers sets a dangerous precedent: that police officers are above the scrutiny faced by everyone else.
"It chips away at open justice and risks further eroding public trust in policing. There is no evidence to justify this sweeping protection, especially when courts already have powers to grant anonymity in exceptional cases.
"One rule for them and another for the public is not justice – it is impunity."
Protests took place following Chris Kaba's deathGetty
Home Secretary Yvette Cooper said: "Police officers in specialist roles who make split-second decisions to keep the public safe must have the confidence to carry out their duties, knowing that the systems which hold them to account for their decisions are fair.
"Too often, those processes have involved unacceptable delays and confusion, which has been damaging both for the police and the public."
These changes will help to boost confidence that the system will work swiftly and effectively for all those involved."
