A search is expected to resume this morning for a diver who's been missing in Wast Water in Cumbria since Sunday afternoon.
The man, who is in his thirties and from West Yorkshire, failed to surface after a dive in Britain's deepest lake.
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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.