A couple convicted of killing their severely disabled son in 2001 have both been found dead in their western Sydney home.

Police were called to the home of Raymond and Margaret Sutton about 11:00am on Saturday after Mrs Sutton’s brother alerted police when he was unable to contact her.

The couple’s bodies are thought to have been in the house in Leonay, near Penrith, for about two weeks.

In 2005, the husband and wife pleaded guilty to the manslaughter of their 29-year-old son, Matthew, who was found dead four years earlier.

Raymond and Margaret Sutton admitted to killing their son the day before he was due to have an operation that would have left him deaf and with no sense of taste.

In 2007 they were convicted and both given five-year good behaviour bonds.

At the time they told the Supreme Court they killed their son because they were concerned the operation would leave him with very limited hearing on top of his existing disabilities, further reducing his quality of life.

In sentencing, Justice Graham Barr said he believed their crime was an act born out of desperation because they could not bear to have their son lose most of his hearing.

The deceased couple were both aged in their 70s.

Siobhan McMahon from the police media unit says a report is being prepared for the coroner.

“Police are investigating the deaths of a man and a woman in the western Sydney suburb of Leonay today,” she said.

“Just after 11:00am this morning police were called to a home on Pleasant Place after concerns were raised for residents inside the premises.

“On arrival, police located the bodies of a man and a woman.

“It [the home] will continue to be forensically examined overnight.”

Commander Brett McFadden says police are not looking for a third party.

“What we do know is that the two persons inside the premises have been deceased for a period of time,” he said.

“We’re just trying to ascertain what’s actually taken place inside the premises.”