Riots are a tough nut for law enforcement in part because of the sheer number of people involved--it’s impossible to stop and arrest every person involved in a skirmish. That’s why cops have some pretty high-tech methods for catching suspects, from facial recognition software to debilitating sonic cannons. But none is as bizarre as this new DNA gun from a UK security firm.

 

 

The SelectaDNA High Velocity System works like it sounds--it shoots people with pellets containing a unique DNA fingerprint. Unlike rubber-pellet guns, Tasers or tear gas canisters, the technology does not deter or disable the suspect--he or she can get away seemingly unscathed.