Chief Superintendent Jeanette McDiarmid will now be the be in charge of policing for Lothian and the Borders. She told ITV News that people in Scotland have nothing to fear from the controversial restructure.
She says it will put a greater emphasis on community policing:
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Sandy Murray, of Police Scotland, was was giving evidence at the trial of a bus driver who denies killing Ryan Baird by dangerous driving.
34-year-old Christopher Peck was involved in a head-on crash with a drunk driver. His funeral has taken place in his hometown, Workington.
The arrests come weeks after a much-publicised series of appeals to mark the 30th anniversary of the 18-year-old's death.