Crime-Fighting Chemical Spray Catches Thieves Off Guard

Police turning to high-tech mist that leaves invisible, odorless paint on crook.
3:00 | 08/11/13

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Transcript for Crime-Fighting Chemical Spray Catches Thieves Off Guard
The turnout to a new and seemingly simple weapon tonight to catch it -- -- authorities are now using the water like sprayed. But could be used to -- her own belongings the valuables in your home at hypocrite little ones off -- them. They'll be in for surprise here's ABC's do you but -- -- tonight. -- this -- police say marks the crook. The spray used here and an undercover set up. Is laced with invisible and odorless paint that can only be spotted with the UV black -- It's cold Smart water CSI. And just last month detectives equipped a. He opens -- He grabbed something on the front steam and that then he starts to rifle through AM a wallet and not is playing this part lottery agents. -- He was marked and a judge mentioned it in court. They examined it with the black Clayton detected. -- Smart water on his clothing and skin. The chemical can last for years on clothing. Police are using it in staying store owners are using the -- as a booby trap over their doors. And anyone who wants to protect their valuables like a watch or iPhone can just mark them with the -- If stolen and found the DNA like fingerprint on the chemicals can help police find the owner. So Logan this has really led to a lot of convictions worldwide hasn't yes in fact -- -- over 12100 convictions in the UK and Euro -- over the last seventeen years. And other companies are now developing similar chemicals but this is so new to the US we're told law enforcement agencies across the country are just now looking into. How it can be used to fight crime.

This transcript has been automatically generated and may not be 100% accurate.

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