Murder detectives have launched a fresh appeal for information into the unsolved stabbing of a much-loved brother, son and uncle in broad daylight.

The Metropolitan Police has also announced the offer of a reward of £20,000 for information leading to the arrest, identification and conviction of those responsible for murdering 20-year-old Lewis Elwin on April 18 last year.

From April 2016: "Things like this don't happen round here": Neighbourhood in shock after murder of Lewis Elwin in Tooting

From April 2016: Tooting murder victim Lewis Elwin died from "a stab wound to the chest"

Lewis was stabbed once sometime between 3.36pm and 3.40pm as children were leaving nearby Penwortham Primary School.

He was found collapsed in the street, and despite paramedics making extensive efforts to save him, the 20-year-old was pronounced dead at the scene.

Wandsworth Guardian:

Scotland Yard today issued CCTV footage of a suspect five-door silver Peugeot seen in the area at the same time as the murder and later found abandoned and burnt later the same day in Putney Park Lane.

Wandsworth Guardian:

Officers have also released an image of the car when it was advertised for sale online. It was sold to a new owner on March 9, 2016 – just nine days before the murder.

Detectives know that on the day of his death Lewis was seen walking towards Mitcham Lane at about 3.30pm, having been dropped off by a family member in Moyser Road, at the junction with Ribblesdale Road.

While Lewis was in Moyser Road, he called a friend at 3.36pm and they planned to meet.

Minutes later he had been stabbed once and fatally wounded.

At 3.40pm, he was seen struggling to run along Penwortham Road from the direction of Moyser Road. He managed to carry on for around a minute until 3.41pm when he collapsed at the bottom of Penwortham Road near its junction with Thrale Road and an ambulance was called.

Wandsworth Guardian:
The murder scene

Police carrying out patrols nearby arrived shortly afterwards.

The post-mortem examination later showed the cause of his death as a stab wound to the chest.

CCTV footage of the suspect vehicle, registration KP03 ZTD, shows the car in the minutes after the murder.

The Peugeot was first spotted around 15:30hrs in the area of Thrale Road and Penwortham Road. It made a circuit around the school and then left along Ullathorne Road where it was captured on camera.

From April 2016: Murder investigation launched after young man dies in Tooting stabbing

His brothers, Byron and Aaron, are also calling for people to come forward to police with information about the incident.

Byron said: "Lewis having his life cut short in this terrible manner devastated our family and deprived us of a much loved brother, son and uncle.

A year later, we still miss him terribly and we are all still suffering from the lasting knock-on effects this has caused.

“Please help the police to find out who did this and get justice for Lewis - please come forward."

Detective Inspector Will Reynolds, from the Homicide and Major Crime Command, said: “Someone out there might have what they think is an insignificant bit of information that could actually prove the key to piecing together what happened.

"Please help us to bring to justice whoever is responsible for this terrible crime."

From May 2016: Two men arrested on suspicion of murdering Lewis Elwin in Tooting

Two 19-year-old men arrested on suspicion of murder in May and subsequently bailed were informed they would not be proceeded with at the end of March this year.

To offer information, call officers at the incident room at Sutton on 0208 721 4005.

To offer information anonymously, call the independent charity Crimestoppers on 0800 555 111.