I think theres a government organizational aspect, that in the US the police forces are often very small. If the forces we’re combining into larger units the specialization becomes economical.
As an example, in the state of New South Wales in Australia, its 1 police force organization for the whole state (8 million people)
As an example, in the state of New South Wales in Australia, its 1 police force organization for the whole state (8 million people)