Police have announced a £20,000 reward for information that nails the killers of a 16 year-old East London teenager - stabbed to death by a gang who snatched his bike in a brutal late-night attack.
Ailton Campos De Oliveria, 16, (pictured) suffered a fatal stab wound to the chest in Denbigh Road, East Ham at 1:10am on July 4.
He was rushed by ambulance to the Royal London Hospital, Whitechapel, but died two days later on July 6.
Newham youth Ailton had been riding a distinctive bicycle (pic.bottom) when he was initially confronted by a group of youths in Boundary Lane East Ham.
They grabbed the teenager and stole the bike before chasing him into Denbigh Road where he was stabbed.
The bike is a black 'Hardrock' model, with the brand 'Specialized' in red letters along the body.
It also features distinctive customised white front shock absorbers, which had been fitted by Ailton.
Along with his bike, the suspects also stole Ailton's Blackberry 'Curve' mobile phone.
The suspects are described as black and in their mid-to-late teens.
Detectives are unable to confirm a specific number, but are aware that some of the group were on bikes.
Detective Chief Inspector Simon Moring, of the Metropolitan Police’s Homicide and Serious Crime Command, said: “We hope that this substantial reward will encourage anyone with information about Ailton's murder to come forward.
“A group of young people targeted Ailton, stole his bike and attacked him in the middle of the street.
“Despite the greatest efforts by medical staff Ailton died and his family and friends are left devastated.
“Someone knows the group responsible and we urge them to think about Ailton and his family and come forward to help us.
DCI Moring added: “Previously we released CCTV images in the hope that further witnesses could be identified.
“We are also keen to trace Ailton's bike and mobile phone and ask for anyone who may have been offered these items to come forward."
Police have already arrested nearly twenty suspects and many of them are on police bail pending further enquiries.
Anyone with information is asked to call the incident room on 020 8345 4142.
If you wish to remain anonymous please call Crimestoppers on 0800 555 111.