Key Points
- Fifty-one-year-old mother of three Samantha Murphy from Ballarat has not been seen since 4 February.
- Police have ruled out a medical episode and say there's nothing to indicate she left the area of her own accord.
- Extensive searches by police, emergency services personnel and locals have so far found no trace of Murphy.
Police say it is unlikely that Victorian woman Samantha Murphy, who disappeared in suspicious circumstances, will be found alive.
The 51-year-old mother of three left her home at Eureka Street in Ballarat East on 4 February to go jogging and has not been seen since.
Detective Acting Superintendent Mark Hatt said police were keeping an open mind over Murphy's disappearance, but said the most likely scenario was that it involved "one or more parties".
He said police had ruled out any type of medical episode and there was nothing to indicate she had left the area of her own accord.
"Unfortunately given the time and the fact we've found no trace of her, we do have severe concerns and are very doubtful that she is still alive," Hatt told reporters in Mount Clear on Friday.
"We are looking into absolutely everything ... this is the utmost priority for Victoria Police and we are throwing a lot of resources at it."
A targeted search by between 20 and 40 personnel will start on Friday in a "fairly small area" in Mount Clear, which is about 6km from the Ballarat town centre, based on intelligence derived from phone data.
Police, emergency services personnel and locals have conducted extensive searches throughout the Canadian Forest area since Murphy's disappearance almost three weeks ago, but no trace of her has been found.
Experienced detectives from a number of units across Victoria Police's crime and counter-terrorism command were deployed to join the missing persons squad, which is leading the investigation.
Investigators are reviewing about 12,000 hours of CCTV footage and following up over 500 separate pieces of information.
SES personnel search a property in Ballarat on 7 February. Source: AAP / James Ross
"I encourage anyone who does have information that could be relevant to this investigation — whether that's a person or vehicle seen in the area on that day, something unusual such as a damaged vehicle or property — to please come forward and speak to police or provide the information via Crime Stoppers," he said.
Police are continuing to ask everyone in the Ballarat East and Mount Helen areas, particularly around the Canadian Forest, to check their CCTV for any possible sightings over the past three weeks.
Detectives are also urging anyone travelling through the area, particularly between 7am and 7pm on Sunday 4 February, who may have dash-cam footage to also check this for possible sightings.
Murphy is described as mentally and physically fit and was training for an upcoming race by doing 15km runs.
A community search effort is expected to take place on Saturday, without police involvement.
