Mark Duggan's family believe he was "assassinated" by police.

As a survey reveals one in four teens expect rioting again in 2012, the Journal takes stock a year down the line.

A previously unseen photograph of firefighters battling ferocious flames in the Tottenham riots last August. Picture: Lewis Whyld/PA

By the feet of the gleaming towers of Hale Village, a dozen delicate yellow roses shiver in the breeze, each one standing defiantly upright, taped between metal railings.

They are the only clue to the shooting which tore apart a family on August 4 last year, and led to the devastation of communities up and down the country, changing the face of Tottenham for good.

Incredibly, despite the shockwaves it created, reaching the highest levels of government, the circumstances of Mark Duggan’s death at the hands of police marksmen in Ferry Lane remain shrouded in secrecy.

His father Bruno Hall died last month not knowing the full facts behind the shooting, while his mother Pam Duggan has called for the policemen involved to go on trial for killing her son in “cold blood”.

Mark Duggan's mother Pamela leaving her son's funeral. Picture: PA/Dominic Lipinski

To this day, none of the firearms officers present have had personal interviews with investigators at the Independent Police Complaints Commission (IPCC) about their actions, hampering its investigation.

When it comes to the public inquest, the law may bar some details of the police operation from being heard, despite demands for an open, transparent hearing by his family, campaigners and even Haringey Council leader Cllr Claire Kober. Home secretary Theresa May has refused to intervene, and there may be no inquest until January.

While a service in Mr Duggan’s memory took place peacefully on Sunday at Tottenham Town Hall, police this time had plans and officers in place in case of unrest.

And despite all the reports, discussions, promises and physical rebuilding since the Tottenham riots, communities secretary Eric Pickles this week acknowledged what those in the thick of it have been saying ever since: A repeat of the rioting cannot be ruled out.

He said the chances of further large-scale disturbances were now “slightly less likely” after communities had shown they wanted to take back their streets, but said nobody in government was complacent.

And despite more than 2,900 people across London being charged or cautioned over their involvement in the disorder, a new survey of 1,000 teenagers found more than a quarter believe rioting could erupt this year as job prospects had not improved.

It reveals that many youngsters say boredom, copycat behaviour, peer pressure, jealousy and fears about the future caused last year’s violence, and little has changed.

Half of them thought more free sports provision could help avert future disturbances.