(London Daily Mail) McDonald’s is installing a spray in more than 700 stores which covers thieves in DNA linking them to a specific crime for several months, it has emerged.

The fast food giant is taking the drastic action following a spate of robberies in its Australian outlets over Christmas and New Year.

The burger chain has linked with up with UK security firm SelectaDNA and will now install the system which covers thieves with the invisible, non-toxic spray in all its 780 outlets across the country.

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