The Suzanne Pilley murder trial in Edinburgh has been hearing how police retraced a car journey to Argyll made by the accused.
Her colleague and former lover David Gilroy drove his silver Vauxhall Vectra from the capital to Lochgilphead the day after she disappeared in May 2010.
He denies murdering Ms Pilley, 38, in Thistle Street or at another location.
After analysing CCTV evidence, police recreated the journey there and back three times.
They discovered Mr Gilroy had taken two hours longer than their average time each way.
And a comparison of fuel consumption suggested there were 124 miles unaccounted for.
The trial continues.