UPDATE: New South Wales police have confirmed a man killed in a single-vehicle crash on the Mt Lindsay Rd, north of Tenterfield, is missing Warwick man Des Salmon.
The 79-year-old was last seen leaving his home at Warwick on Sunday morning.
A motorist reported seeing his Honda Jazz crashed down an embankment off the Mt Lindsay Rd at 10.45am yesterday morning.
It's believed Mr Salmon was travelling south from Legume when his vehicle left the road and crashed.
No other vehicles appear to be involved in the crash, with authorities unsure of when the crash occurred.
A post mortem examination will be conducted to determine the cause of death.
Police are urging anyone with information to phone Crime Stoppers on 1800 333 000
8AM: Police have confirmed missing Warwick man Des Salmon has been found dead in New South Wales.
Early reports suggest he was involved in a car crash in the state's north.
New South Wales police will be issuing a statement today.
6AM: HE'S a 79-year-old man who loves church, reading the paper and spending time with his family - and he's missing.
Des Salmon was last seen on Sunday morning at about 8am when he bought the paper from Hynes Newsagency on Palmerin St.
He was seen wearing slippers and a light grey tracksuit and drove his white Honda Jazz with the registration number 648 LXZ.
His son Greg Salmon said his family came together to look for their father.
"We have no idea where he would possibly go," he said.
"He's a creature of habit and he always goes to the same places.
"It's terribly stressful.
"We've been driving around to all the possible places he could be."
Mr Salmon hasn't been diagnosed with dementia, although his family thought he had started to show early symptoms of the illness.
Officer-in-charge Senior Sergeant Jamie Deacon is assisting the family with the search.
"He has a fairly set routine, and we're making contact with the people that are involved with that routine," he said.
"We've spoken to all of his family members and they don't know where he is."
Mr Salmon would usually attend church on a Sunday morning, however he didn't turn up.
Greg said for his dad to do something like that was "totally out of character."
His mobile phone, shoes and the rest of his belongings were found at his home at the Oak Tree Retirement Village.
"It's like he just wanted to duck out quickly to grab something and head back home," Greg said.
Mr Salmon had been suffering from a serious chest infection and spent the past few days in bed. His wife has severe Parkinson's disease and lives in a nursing home.
The couple have been married for the past 56 years and were separated for the first time when she moved into the nursing home in March this year.
Mr Salmon visited his wife every day at the home.
She doesn't know Mr Salmon is missing.
"Mum wouldn't understand," Greg said.
"She lives in her own little world."
Anyone with information should phone Crime Stoppers on 1800 333 000.
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