World News on NBCNEWS.com: Thief convicted after being caught green-handed (and faced) by SmartWater CSI.

The face of Yafet Askale, who was convicted of stealing from a car after he was sprayed with the odorless chemical mist. Metropolitan Police

The face of Yafet Askale, who was convicted of stealing from a car after he was sprayed with the odorless chemical mist. Metropolitan Police

LONDON — A chemical mist which turns perpetrators florescent green is being used to target thieves in Britain.

Officers have started fitting SmartWater technology to security systems in cars and houses in the U.K.’s capital.

When someone tries to break in, they are sprayed with the odorless substance which is only visible under ultraviolet light and cannot be washed off.

Crooks have no idea they have been tagged — until it is too late.

The dramatic effect can be seen in these photos of Yafet Askale, a 28-year-old who stole a laptop from a “trap car” in the Brent area of London which police had fitted to spray the mist, which is known as SmartWaterCSI in the U.S.

 Go to full World News on NBCNEWS.com coverage.

 

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