The private security firm Securitas Ltd will trial guarding major crime scenes so Dorset Police can go back on the front line.
Scenes of major crimes, such as murder and serious assault, were previously guarded by police officers taken from their day to day job.
But by getting the security company to guard the scene instead, between 2600 and 3600 hours will go back into police front line services.
Detective Chief Superintendent Mark Cooper, Head of Dorset Police Criminal Justice Department said, "Outsourcing has been tried and tested by other forces for a number of years and it has been found to be a very effective way of securing evidence."
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