Janice Collins is a leader in the UK anti-gun campaign
The mother of a teenager shot dead a year ago in Nottingham has said she is determined to carry on with a campaign to end gun violence.
Janice Collins, who is working with other women throughout the UK as part of Mothers Against Guns, said she believes people are withholding information about her son's murder.
Brendon Lawrence, 16, was shot three times as he stepped out of a car close to his home in St Ann's on 19 February, 2002.
Nottinghamshire detectives say they are following new leads in a bid to catch his killer.
Ms Collins, who led an anti-gun march in Nottingham earlier this month, said: "The next thing we have is a big memorial service in Manchester."
A Nottinghamshire police spokesman said: "Police continue to investigate the murder and have followed up literally hundreds of lines of inquiry.
"A number of people have been arrested, however no-one has yet been charged with the murder."
Earlier this month, police gave details of a distinctive pair of trainers recovered from a burnt-out car used by one of those believed to be involved in the killing.
The Nike trainers are vital evidence
Detective Chief Inspector Helen Jebb said her inquiry team believed one of those responsible for Brendon's death wore the black Nike Bohemian shoes, which had two of the trademark swoosh symbols removed.
Police said the shoes and a blue-and-green jacket were discovered in a Ford Fiesta XR2, stolen from Brendon's friend at the scene and dumped in nearby Westville Gardens.
Two black men who were seen in the car - registration number G303 NWG - have yet to be traced.