ABC World News Video- Crime Fighting Chemical Spray Catches Thieves Off Guard

Turning to a new and seemingly simple weapon tonight to catch a thief, ABC World News reports police departments and authorities around the country are now using a water-like spray to mark their crooks. The spray used here in an undercover set up is laced with invisible and odorless paint that can only be spotted with the UV black light. It’s called SmartWater CSI.

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