The Garda Ombudsman Commission announced it has completed its investigation into the death of George Nkencho and has sent a file to the Director of Public Prosecutions.
Mr Nkencho, aged 27, was shot dead by an armed Garda outside his family home in Clonee, Co Dublin, in December 2020.
At the time of the shooting, Gardaí said Mr Nkencho was armed with a knife at a shop in Hartstown before walking home and subsequently threatening Gardaí.
Gardaí claimed Mr Nkencho was shot after attempts to subdue him with a taser and pepper spray were unsuccessful.
GSOC announced the end of their investigation and said the DPP is now to decide if the Garda who shot Mr Nkencho is to be prosecuted.
The family of Mr Nkencho welcomed GSOC’s decision and said those responsible for Mr Nkencho’s death “should face the full extent of the law”.
“This development brings us a sense of relief and hope as it signifies the potential for criminal charges to be brought against the officers responsible for George’s death,” Mr Nkencho’s sister, Gloria Nkencho, said.
“We are encouraged by the prospect of a thorough examination of the evidence by the DPP - we implore them to carefully consider the strength of the investigation.
“It is our sincere hope that the DPP proceed with the utmost diligence and bring forth the appropriate criminal charges.”
Mr Nkencho’s family previously said he was suffering from a mental health crisis at the time of the shooting.
The death of Mr Nkencho sparked 'Black Lives Matter' protests across Ireland calling for a public investigation into his death.