Cops mark protesters with invisible ink (VIDEO)

Cops can "brand" protesters with invisible ink like the Nazis branded the Jews during Hitler's time (VIDEO)



Several Occupy Montreal protesters were marked by invisible ink on their hands by cops. 

Other police departments in the US are using ink to mark property, but what happens when inking property, turns to inking people- as it did for the protesters in Montreal? 

When cops can mark citizens in protests with invisible ink, what else can they use?

Introduced to the police market a "DNA gun"-- featured in the Las Vegas "shot show" this year, a DNA gun that leaves an invisible trace on skin.

Other gadgets may be coming to law enforcement near you. RT's Margaret Howell explains.