A man whose body was found buried in a garden was allegedly killed by his daughter several years ago, the BBC understands.
Greater Manchester Police said a woman made a confession at Cheadle Heath police station on Sunday.
On Tuesday, remains believed to be of Kenneth Coombes, were found in a garden in Matlock Road, Reddish, near Stockport.
A 63-year-old woman has been arrested on suspicion of murder.
A force spokesman said the man had not been formally identified but his family had been informed and was being supported by specially trained officers.
He said it was "still very early days in our investigation" and thanked the public "so far for their support".
Michelle Adamson, BBC Radio Manchester
The cordon on this quiet suburban street has now been extended a second time.
After the grim discovery of human remains on Tuesday, the road was shut and the cordon now extends to 200ft as police continue to search the crime scene.
Forensic teams have worked through the night with much of the work focusing on the rear end of the garden.
Workmen at the property next door have been told they cannot work today as the search continues.
Door-to-door inquiries have been conducted on Matlock Road, with residents being asked if they know a man called Kenneth Coombes.
The questionnaire suggests he would have been in his late 80s in 2005 and electoral records appear to confirm he lived at the address.
Yvonne Harrison, who lives a few doors away from the crime scene, spoke of her "horror" about a body being found in a neighbouring garden.
"It's really shocking and very strange," she said.