A quick-thinking 10-year-old boy's heroic actions have helped put two violent jewellery thieves behind bars.
Didier Levenfiche raised the alarm and memorised the robbers' faces when they targeted his mother in a terrifying attack at their family home.
His mother, Tania, had just arrived home with Didier in Hampstead, north London, when the jewellery snatchers grabbed her round the neck and stole her valuables.
The 48-year-old was approached from behind by two men who placed her in a head-lock and pulled violently at her ears, ripping out her earrings, in the attack in June last year.
But the schoolboy managed to push the panic button on the alarm system at the house, while carefully studying the faces of the attackers.
He was later able to pick out one of the suspects in an identity parade. His mother revealed he has since had continuous nightmares about the attack.
Thanks to Didier's swift actions, brothers Eugene Williams, 36, and 33-year-old Devlin Williams were on Tuesday jailed for a total of 14 years and eight months for a spate of robberies across London.
The schoolboy was named Westminster police's hero of 2016.
Eugene Williams, from Forest Gate, east London, was found wearing a £9,000 Rolex and a £20,000 diamond signet ring when he was arrested in August last year.
In December he pleaded guilty to robbing four women between November 2015 and June 2016 as well as possession of criminal property.
Appearing at Southwark Crown Court on Tuesday, he was jailed for eight years. His licence was also extended for three years.
His brother Devlin Williams, from Wembley, north London, pleaded guilty to one count of robbery on June 13 2016 and two separate offences of robbery committed on August 4 and 7 2016.
He was sentenced to six years and eight months' imprisonment. His licence was also extended for three years.
Another man, Hatim Nahal, 31, from Harrow, was Devlin Williams' accomplice in the robbery on August 7 - having pleaded guilty at a previous hearing. He will be sentenced tomorrow (May 3).
Detective Constable Martin Thomas, the investigating officer from Westminster's Crime Squad, said: "Eugene and Devlin Williams are dangerous criminals who targeted innocent people across London.
"Thanks to Didier's attention to detail, both men were arrested in August 2016 and successfully picked out at an ID parade.
"Didier's brave actions directly led to them being brought to justice and we are very proud to have named him as our hero of the year."
Mrs Levenfiche said the youngster had been left traumatised by seeing her attacked in their own home. She said:
"My son did not know what to do as he stood helpless but thank goodness had the sense of mind to push the panic button. As he said to me after the attack 'Mummy I felt so bad I couldn't save you'.
"He has since had continuous nightmares about the attack and is so scared to get in and out of the car in our driveway at any time of the day or night.
"He has not slept a whole night since the incident and also is very disturbed by the fact that the attackers kicked our dog over and over as she tried to jump up at them to help me.
"Please remember that he watched this whole incident and the face of the attacker staring at him.
"The Westminster Crime Squad and in particular Detective Martin Thomas have done an amazing job in piecing together this jigsaw."
Other victims were attacked on their doorsteps by the thieves who ripped jewellery from their bodies.
In one instance in November 2015, Eugene attacked a 55-year-old woman on her doorstep with an accomplice.
He covered the victim's mouth and nose with his hand and said: "Don't shout don't scream or we will hurt you", while the other suspect took the victim's £94,000 diamond engagement ring, wedding ring and Cartier watch.
DC Thomas added: "The level of violence used against these victims was gratuitous and has left them traumatised.
"Westminster Crime Squad have worked tirelessly to convict these robbers who used the proceeds of their crime to fund their lifestyle. London is much safer with these violent men bought to justice and behind bars."