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Nearly 6,000 new crimes including murder and robbery have been committed by London rioters since their rampage in the capital just over three years ago, official figures reveal today.

The disturbing statistics show that 1,593 of the 3,914 people charged or cautioned by the Met following the riots in August 2011 have since reoffended in a new crime spree.

Their offences include 12 killings, 180 attacks causing wounding or GBH and 151 crimes involving a weapon. They were among a total of 1,172 new violent offences committed by the former rioters.

There were also 21 rapes, 719 burglaries and 451 robberies. One of the reoffending rioters has committed 72 new crimes since the 2011 disturbances.

The rioters’ return to crime will raise fresh questions about the effectiveness of rehabilitation policies in the capital and was greeted with dismay by London’s policing supremo, Deputy Mayor Stephen Greenhalgh. He said that urgent changes were needed to protect the public by keeping a better “grip” of offenders.

“Londoners remember how a minority of violent thugs caused mayhem in August 2011,” he said. “These figures show that some of them are still committing serious crimes and prove that the riots were fuelled by prolific offenders rather than low-level opportunists.

“Even though the police have learnt the lessons of the riots, the wider criminal justice system needs to up its game and stop playing pass the parcel with these violent criminals.”

Today’s statistics, obtained by the Evening Standard using the Freedom of Information Act, provide the most comprehensive picture so far of the criminal activities of rioters since they were dealt with the courts for their role in the disturbances of 2011.

They show that 3,914 people in London, including 164 adults and 34 juveniles subsequently logged as gang members, were prosecuted or cautioned for offences committed during the riots.

Of these, 1,593, including 168 gang members, had offended again by the end of 2014. They include 107 people who had committed ten or more new offences . Of these 17 were gang members.

Another 261 rioters, including 49 gang members, have since committed between five and ten more crimes.

The new figures also show that as well as the murders and rapes, the overall total of 5,878 new crimes committed by the rioters there were also 1,075 thefts and 1,819 drug offences. Of these, 221 involved drug trafficking.

Reoffending rioters have also committed 36 fraud or forgery offences, 25 crimes of “going equipped” and were responsible for 213 incidents involving criminal damage.

Violent offences included 314 “assault with injury” crimes, 171 cases of common assault and 265 of harassment.

As well as the 21 rapes, there were 33 “other sexual” offences. The tally of 451 robbery offences is comprised of 383 muggings and 68 raids on businesses.

Mr Greenhalgh, who is seeking to have City Hall placed in overall control of London’s entire criminal justice system in a New York style reform, said the statistics showed that significant improvements were needed.

He added: “We need to grip these offenders. Many have not been deterred, despite prosecuting them more quickly in 2011, and have gone on to rape and murder in some cases.

“If we want the rhetoric of a rehabilitation revolution to become a reality in our capital city, then the Mayor must be given oversight of London’s criminal justice system.”

The Met said it worked with City Hall and organisations such as the Youth Justice Board to reduce reoffending, but that the task of monitoring freed offenders was mainly the responsibility of other agencies.

A spokeswoman added: “The Met does not hold the primary responsibility for managing offenders in the community. We do, however, work closely with responsible agencies such as the Probation Service in seeking to reduce reoffending.

“The Met also specifically targets offenders who continue to commit crime, given the harm that these individuals pose to communities.”

Some offenders jailed during the riots are still in custody for the crimes they committed during the disturbances. But most have either been freed from their prison terms, despite the enhanced sentences handed out in some cases, or were given non-custodial penalties at the time.

Today’s new statistics follow this newspaper’s disclosure of separate figures from a study of eight London boroughs showing that 418 prolific offenders living there have carried out about 20,000 offences. That is an average of around 48 each. The eight worst offenders registered more than 150 crimes apiece.

Earlier Ministry of Justice statistics, obtained by the Standard last March, also highlighted the problem of reoffending in London. They showed that 554 criminals in the capital, each with at least 50 previous convictions, had offended again after being freed during one 12-month period.