Police have carried out roadside searches as they investigate the death of a man found dead in an isolated farm after he left T In The Park.
Jim Richardson’s body was found 10 miles from the site of the festival on July 12.
Police Scotland are now under investigation by the Police Investigations and Review Commission over their handling of his disappearance.
Now officers have undertaken searches on the side of the A9 dual carriageway between Auchterarder and Perth as part of the investigation.
A section of the northbound carriageway on the Cairnie Braes between the Dunning and Forteviot junctions was shut on Monday night.
Police vehicles sat at the end of the coned off section as officers scoured undergrowth at the side of the road as they probe Mr Richardson’s disappearance.
Desperate loved ones posted appeals online for sightings after Jim at the end of the festival.