A fatal accident inquiry is to be held, after the deaths of two people in a crash near Stirling.
Lamara Bell and John Yuill died after their car came off the M9 in July 2015.
Officers took three days to respond to the crash.
Mr Yuill was found dead at the scene, while Ms Bell died in hospital.
Police Scotland have paid out more than £1 million in compensation to the family of Lamara Bell.
The fatal accident inquiry is due to begin in December.
Procurator Fiscal Katrina Parkes, head of COPFS’s Scottish Fatalities Investigation Unit, said: "The Lord Advocate considers that these deaths occurred in circumstances giving rise to significant public concern.
"This has been a complex, detailed and lengthy investigation. The lodging of the first notice enables FAI proceedings to commence under the direction of the Sheriff.
“The families and their legal representatives will continue to be kept informed of significant developments as court proceedings progress.”
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