Oxley detectives charged Natasha Darcy-Crossman with the murder of the 42-year-old farmer on Saturday night – about 12 hours after she was arrested in Walcha.

Police will allege she murdered the popular Walcha local at his sheep property, off the Thunderbolts Way, just out of Walcha, on August 2.

She was refused bail on Saturday night by Oxley police and will front a bail hearing in Tamworth Local Court on Sunday morning.

Police said investigations by Strike Force Ballin – the police operation set-up to investigate Mr Dunbar’s suspicious death – are continuing.

A WOMAN has been arrested and detectives are scouring a property near Walcha as part of a murder investigation into the suspicious death of a popular farmer.

Fairfax Media was there as Natasha Beth Darcy-Crossman was led into Tamworth Police Station, seated in the back of a marked Walcha police car, shortly before 11am on Saturday.

She was arrested at 9.30am by Oxley detectives in Walcha who are investigating the death of her late partner, Matthew Dunbar.

Mr Dunbar, 42, died at his sheep and grazing property, Pandora, off Thunderbolts Way, in the early hours of August 2.

Fairfax Media revealed shortly after that police were investigating Mr Dunbar's death as a possible murder, with the homicide squad called in from Sydney to assist local Tamworth detectives, who set-up a strike force to probe the suspicious death.

On Saturday morning, shortly after Ms Darcy-Crossman's arrest, detectives executed a crime scene warrant at the Pandora property with investigators seen scouring the house, and searching part of the roof.

Officers were also seen carrying a drum and a bag of evidence into a police vehicle.

It's the second time the property has been raided as part of the police investigation.

See also:

Farmer farewelled, case ongoing

Murder probe after farmer’s death

Fairfax Media understands Darcy-Crossman is in custody and is being questioned on the circumstances surrounding the death at the property.

A post-mortem was carried out on Mr Dunbar's body shortly after the August 2 death, after a crime scene was set-up on the property.

Oxley police were unable to comment on Saturday when contacted by Fairfax Media, but issued a short statement confirming the woman’s arrest.

“A woman has been arrested in relation to the suspicious death of Mathew Dunbar in the Northern Tablelands three months ago,” the spokesperson said.

“Emergency services responded to reports of an unresponsive male at a home on Thunderbolts Way, Walcha, about 2am on Wednesday, 2nd August, 2017.

“Despite the efforts of NSW Ambulance paramedics, 42-year-old Mathew Dunbar died at the scene.

“Strike Force Ballin was established by detectives from Oxley Local Area Command assisted by the State Crime Command's Homicide Squad to investigate the circumstances surrounding Mr Dunbar’s death.

“Following extensive inquiries, a 42-year-old woman was arrested and conveyed to Tamworth Police Station about 9.30am today.

“She is assisting with inquiries.”