Police have launched a probe after its officers issued a caution to a biker who viciously assaulted a fellow motorist leaving him with a broken nose.
Birmingham bank manager Ryan Gough was left bloodied and bruised after being punched in the face by the thug after he parked his car outside his girlfriend's family's home in Asfordby, near Melton Mowbray.
Ryan, aged 41, from Tile Cross, was left stunned when Leicestershire Police told him that they had given his attacker a caution.
Under controversial national guidelines, which tie the hands of frustrated cops, the attack was classed as not serious.
The thug also apologised.
Following complaints by Ryan, who is also a stand-up comedian and leading fundraiser with the Harry Moseley Appeal, Leicestershire Police have said that they are now investigating the case.
A force spokesman said: "A complaint has been received and is currently being looked into by the professional standards department.
"It would be inappropriate for us to comment further at this stage."
Ryan also complained to the Independent Police Complaints Commission (IPCC), but they were unable to investigate.
An IPCC spokesman said: "Our remit is to look into matters involving officers conduct.
"Mr Gough states he was very happy with the officers involved.
"This is a procedural matter and it is appropriate it is dealt with by Leicestershire Police."
Ryan, who blames recent police funding cuts for fostering a culture of leniency, said: "The officers who dealt with me were excellent, I have nothing but praise for them.
"But this is just proof the police are overworked and the prisons too full, their hands are tied.
"Sending someone to court is so costly that you can walk away scot-free after breaking someone's nose.
"This was an unprovoked attack on another citizen and it should have been treated as an assault."
The biker punched Ryan four times after he knocked on his car window two weeks ago.
Ryan, who manages a Barclays branch in Sheldon, said: "I was totally defenceless because I was sitting in the car, strapped in by my seat belt.
"He had his helmet on, and some sort of protective biker gear."
The attack was witnessed by Ryan's girlfriend, her sister, mother and 76-year-old grandmother.
Leicestershire Police rejected claims that the thug had been let off due to funding cuts.
A police spokesman said: "On interviewing the offender, he fully admitted the offence and was remorseful for his actions.
"Officers have a number of disposals available to them.
"In these circumstances, due to the nature of the offence, in line with national guidelines, a caution was deemed the most appropriate disposal."