An ultra-violet light has helped police track down, identify and charge a thief who broke into a car.
Yafet Askale, 28, who initially denied breaking into a vehicle in the northwest London suburb of Harlesden, was found by police covered in an ultra-violet dye.
The car he had broken into was set-up by authorities and rigged with SmartWater, an anti-theft security system that detects intruders and then sprays them with a chemical dye only visible under ultra-violet light.
SmartWater is reportedly odourless and invisible to the human eye.
The dyes released by the system are unique and allow police to trace criminals' whereabouts.
Detective Inspector Madeline Ryder of Brent Police released photos of Askale as a warning to other would-be-thieves.
"This is another excellent example of the thorough work completed by Brent Officers.
"Using the trap car technology we were able to charge Askale and put him before the courts," she said.
SmartWater is being trialled by police in the area in an attempt to reduce the rate of crime.
Free trials have also been distributed to residents to mark valuable property within their homes.
"The trap car forms part of an overall crime reduction strategy designed by SmartWater which is an effective weapon in the armoury of tools that we routinely use in Brent.
"We will continue to target those who are insistent on committing these types of offence," Ryder said.
Upon contact with human skin, the SmartWater chemical is very difficult to remove.
It is also impossible to wash from clothing.
Yafet Askale was found to be in possession of property stolen from the vehicle, including a laptop.
He was sentenced to 49 hours of community service and ordered to pay $700 in fines.