Overview
- Major Crime detectives and SES teams conducted targeted bushland searches east of Andamooka on Tuesday without finding new evidence.
- Police plan door-knocking across Andamooka on Wednesday to collect local information and potential sightings.
- Trisha Graf, 41, was last seen about 2am on December 12 driving toward home after an evening at the Roxby Downs Hotel, having earlier struck a kangaroo.
- Her 2012 Ford Territory was discovered bogged near Blue Dam with her thongs left with the vehicle, and extensive ground, aerial and dive operations have located no trace.
- Police say they hold grave concerns for her welfare; relatives told 7NEWS they now fear she was killed, and investigators have interviewed key witnesses including her partner, who is cooperating.