This new high velocity DNA tagging system, designed by UK firm Selectamark, fires small soft green DNA pellets which could remain on the target's skin for weeks.
Andrew Knights from Selectamark said: 'On contact with the target the uniquely-coded SelectaDNA solution leaves a synthetic DNA trace mark that will enable the relevant authorities to confirm or eliminate that person from their involvement in a particular situation and could ultimately lead to arrest and prosecution.'
Just think for a moment the potential civil rights and legal issues this type of technology introduces. Lets say you are part of a peaceful protest (oh let's say Occupy Wall Street), and the government and police don't like the unpleasant and uncomplimentary things you are saying about their buddies on Wall Street. Let's assume that within the 500 people at a protest, there will always a few undesirables who do something stupid, like throw a brick through a window. Then, the police start spraying DNA tags into the crowd, and you are all instantly tagged as criminals.