EXCLUSIVE: Is this ANOTHER of the South Carolina serial killer's victims? Police probe picture of woman he posted online amid more grisly finds

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Serial killer Todd Kohlhepp posted a creepy picture on the internet of a woman walking through his farmland - leading police to investigate whether she could be one of his victims.

Detectives are working on the theory that their suspect gave a number of cryptic clues on the web about his murder and kidnap campaign.

Now DailyMail.com has discovered the chilling picture that he took and posted on Facebook. His page has since been closed down.

But the image shows a woman walking through his 96-acre property in Woodruff, South Carolina, and seemingly photographed without her knowledge.

The woman in the purple dress has blonde hair and is walking away from or past the suspect, whose land was open to public access until he installed a wire fence around the entire perimeter.

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Serial killer Todd Kohlhepp posted a picture of a woman walking through his farmland and posted it to his Facebook page (right). Police are now investigating whether she is one of Kohlhepp's victims 

Kohlhepp's land was open to public access until he installed a wire fence around the entire perimeter. Authorities have searched Kohlhepp's land and have now extended their search to other properties connected to him. They are pictured digging in Woodruff, South Carolina

No clue was given by the suspected serial killer of her identity, but an observer posted underneath it after his arrest: 'Could this be one of his victims?'

The photograph was discovered by a local resident, who showed it to DailyMail.com.

She said she believed the police would be interested in it as the identity or sex of two of the victims buried on his land have yet to be established.

One of the bodies exhumed from a shallow grave is that of Charles Carver, who was shot dead in a killing said to have been witnessed by his girlfriend Kala Brown who was held captive for two months in chains on Kohlhepp's property.

Kohlhepp, 45, a convicted sex offender, confessed to murdering four people in 2003 over the weekend after he was allowed by police to see his mother and tell her first of the slayings that took place in a motor bike shop.

Kohlhepp has been charged with the murder of of Brian Lucas, Scott Ponder, Beverly Guy and Chris Sherbert at the motorcycle shop in Chesnee, South Carolina on November 6, 2003.

He also faces a charge of kidnapping Kala Brown.

Inquiries have spread beyond South Carolina to Arizona where he was convicted of a sex attack with police saying that he held a pilot's license and sold property.

One of the bodies exhumed from a shallow grave is that of Charles Carver (left), who was shot dead in a killing said to have been witnessed by his girlfriend Kala Brown (right) who was held captive for two months in chains on Kohlhepp's property.

But officers are also closely examining his social media activity for clues to his crimes and whether he used his work as a realtor to snare his victims making the photograph part of the investigation.

Postings on Amazon by a user named 'Me' on a wish list linked to his name began in 2014, close to the time he purchased the farmland and told local hunters to keep off in the future saying: 'You're hunting days are over.'

For a shovel with a folding handle, the user posted a review suggesting, 'keep in car for when you have to hide the bodies and you left the full size shovel at home'. 

The same user left a review for a knife that read: 'havnet (sic) stabbed anyone yet...... yet.... but I am keeping the dream alive and when I do, it will be with a quality tool like this...'

In a review about a padlock, the Greenville News reports that the user wrote: 'solid locks.. have 5 on a shipping container.. wont stop them.. but sure will slow them down 'til they are too old to care.'

Brown, 30, was found chained by the neck and feet inside a rusty-colored container by officers who entered the land with a warrant last Thursday.

Local sheriff Chuck Wright told DailyMail.com: 'I'm going to be honest with you. I don't chain my dogs up and I wouldn't treat my dogs the way this lady was treated.'

Further postings by Kohlhepp on Facebook have also been included as part of the investigation.

On September 15, two weeks after Brown and her boyfriend went missing, Kohlhepp posted: 'Reading the news..this person missing, that person missing, another person missing, oh wait, that person just went to beach with friend, other person found with her parole violation boyfriend…in the event I become missing, please note no one would take me.

On a review of a knife posted on 13 September 2014, he said: 'havnet (sic) stabbed anyone yet...... yet.... but I am keeping the dream alive and when I do, it will be with a quality tool'

For a shovel, the user wrote a review, suggesting: 'keep in car for when you have to hide the bodies and you left the full size shovel at home'

The Amazon user posted 140 reviews in all with the majority between May and September 2014

'I eat too much and I am crabby, they would just bring me back or give me 20 bucks for a cab ride, most likely if I am missing, its because my dumb a** did something on that tractor again and I am too stubborn to go to the doctor…I got 9 lives...I ain't done yet.'

On September 30 he added: 'Just admit it..you look at the news, you see the political crap and the school shootings and just general wth (sic) is going on…zombie apocalypse is starting to look better and better every day.'

In another posting the same month, he said: 'Another day at camp ohs**tthisisgonnahurtinthemorning…bushhogged all day yesterday…looks like another day of it today…I don't care hos (sic) sexy she thinks my tractor is…by the time you get off the damn thing all you want is a shower and the noise to stop…think I need to invest in concrete and green paint.'

On November 3, he added on Facebook: 'We need ebola to come as a huge snowstorm, wipe out half the population, then melt away…just tired of entitlement, rude a** people for no reason..people who race to cut in front of you to slam on brakes to make right turn…and that mother------ that stands in the isle (sic) at the grocery store ( and dude you know who you are) that blocks the isle (sic) checking out the microbrews and blocking everyone on their way to their average Michellob…b***h move.'

County sheriff Chuck Wright (pictured talking to reporters Sunday) said of the second body: 'We can't tell anything about the cause of death, gender or how long or any of that stuff'

Tood Kohlhepp (pictured) is charged with four counts of murder in the shooting deaths that occurred at a motorcycle shop in Chesnee, South Carolina on November 6, 2003

Sheriff Wright said Kohlhepp had been remorseful, prayed with him over the weekend and was being cooperative.

But he stressed that police would continue searching the land until they were satisfied every piece of evidence had been uncovered.

'This is one of the biggest crime scenes that I have ever been involved in,' he said.

Detectives have expanded their search perimeter beyond Kohlhepp's 96-acre farmland in Woodruff and are now looking at other properties linked to him.

The search extends beyond South Carolina, Wright said, although he declined to say where investigators were looking.

Homeland Security and the FBI have gotten involved in the search.

Experts meticulously dug into the ground to recover the second body while preserving as much evidence as possible, Spartanburg County Coroner Rusty Clevenger said.