The inquiry spoke to witnesses, medical staff and a Taser expert
Multiple use of a Taser stun gun by police on a man that was filmed on a mobile phone was "necessary", a report has concluded.
In June last year Nottinghamshire Police responded to reports of a disturbance near a city bar.
During an arrest the Taser was used on a suspect several times.
The Independent Police Complaints Commission (IPCC) began an inquiry and has now said there are no grounds for bringing misconduct proceedings.
A Taser is a hand-held device that uses a 50,000-volt shock to disable a suspect.
Filmed by driver
Police said that when officers went to arrest the suspect at Foxy's nightclub in Upper Parliament Street he resisted and there was a violent struggle, during which one officer was bitten.
The incident was filmed by a taxi driver and the pictures made global news.
The man's solicitor, Susie Gregson Murray, said she was very surprised there was no criticism of the way the police used the Taser.
She added it sent out completely the wrong message to the police, "and will only encourage them to use the Taser in an aggressive manner".
A civil action against the police will continue, she said.
Police watchdog commissioner Amerdeep Somal said some of it appeared to show officers being "over-zealous" in their efforts to arrest the man.
But Ms Somal, of the IPCC, added: "The overall evidence suggests that it was necessary for the officer to activate his Taser several times due to the continued and escalating resistance being demonstrated.
"Officers have a right to protect themselves and deal robustly with unruly behaviour while policing a busy city centre at night.
The gun delivers a 50,000-volt electric shock through two darts which are on the end of 21ft-long wires.
The IPCC took statements from a number of eyewitnesses, police officers, hospital staff and an expert on Taser use, as well as examining the available CCTV and mobile phone footage.
It said the man involved had not accepted a request to give evidence.
And it concluded the officers' actions were lawful and proportionate and there was no evidence of any criminal offence being committed.
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