A detective has been sacked for failing to investigate an assault in Dalston made using the gun passed onto Mark Duggan the day he was shot dead.

Det Con Stephen Faulkner was ordered to investigate a pistol whipping in Lagoon Hair and Beauty, Kingsland Road on July 29 2011.

He claimed the victim Peter Osadebay refused to name his attacker, who was later found to be Kevin Hutchinson-Foster.

Hutchinson-Foster was the man who gave Mark Duggan the BBM Bruni Model 92 handgun inside a sock drenched in Osadebay’s blood on August 4.

The same day, 29-year-old Mr Duggan was shot and killed, sparking the 2011 riots.

The Independent Police Complaints Commission (IPCC) found a number of failures with the investigation, but accepted even if it had been up to standard it was “highly unlikely” Hutchinson-Foster would have been identified before giving the gun to Mr Duggan.

A five-day hearing, which ended on Friday, found that CCTV clearly showing the assault was not circulated at the earliest opportunity, witnesses were not contacted and blood swabs were not submitted for forensic analysis for several months.

Det Con Faulkner was found to have attempted to deceive his supervisor to imply he had circulated the CCTV in good time. He was dismissed without notice for failing to act with honesty and integrity and failing in his duties and responsibility.

IPCC deputy chair Sarah Green said: “A number of explanations were put forward as to why the investigation into an assault did not progress as quickly as it should have.

“Whilst we accept that even if the assault had been promptly investigated, it would have been highly unlikely the assailant could or would have been identified before he provided the gun to Mark Duggan, the investigation was not given the priority it should have been.

“The public needs to feel confident that the police are doing all they can to ensure that these weapons are taken off the streets, including prompt and effective investigations and overcoming perceived difficulties.”