A man who was jailed after his dog attacked five police officers has been cleared - after successfully arguing that police were to blame.
Symieon Robinson-Pierre's pit bull bit officers in Stratford in March 2012. A local resident described the scene as "the most horrific he had ever witnessed".
Robinson-Pierre was given a 22 month jail term after being convicted of having a dog dangerously out of control in a public place.
But the Court of Appeal overturned the conviction after he successfully argued that the dog's escape into a public place was the fault of the police - not his.
The police had forced entry into his house to execute a search warrant, and he claimed that was why the dog escaped.
Jurors had heard that Mr Robinson-Pierre had told officers after being arrested: "It's not the dog's fault. You should have knocked. I would have let you in."
Dangerous dogs are being traded for thousands of pounds as part of drug deals and debt payments by gangs.
A new report from Middlesex University says dogs like mastiffs and pit bulls are being bred to make money, and being used as a commodity to be traded. Paul Brand reports:
Dr Simon Harding of Middlesex University London, who is behind new research that has found dogs are being used as business assets, explains his key findings:
Dangerous dogs are being bred by young men as business assets in drug deals, debt collection and for their gang image, according to research published today.
More young men were using aggressive dogs, such as Pitbulls, as a "commodity" for security and making money in gangs, the study found.
Dr Simon Harding, of Middlesex University London, who is behind the research, said: "For many young people, dogs are increasingly viewed as a commodity which can be traded up or down like a mobile phone.
An inquiry has been launched today into loopholes in existing laws controlling irresposible dog ownership.
A Select Committee of MPs is carrying out inquiries into the menace of dangerous dogs bred for fighting or bought as status symbols.
Phil Bayles reports from Battersea.
Homeless dogs at Battersea helped launch a government investigation into loopholes in existing laws controlling dangerous dogs.
MPs of all parties are carrying out inquiries into the menace of dangerous dogs bred for fighting or bought as status symbols.
Battersea Dogs and Cats Home backs the move, saying that tougher controls are needed over dog ownership. The Home has to give shelter to dogs dumped by irresponsible owners and then try to rehome them.
Owners of dangerously out of control dogs which harm others in a public place will face up to 18 months in prison under new guidelines for judges. The tougher approach will see more offenders jailed, more given community orders and fewer being discharged.