Riverwood suspected murder-suicide: Mystery surrounds the deaths of a truck driver and his retail worker wife after grisly discovery is made at their suburban home as neighbours reveal what the couple was really like

A lorry driver and his retail worker wife have died in a suspected murder-suicide – as shocked neighbors discover the couple leave behind a teenage daughter.

Zheng Hong Li, 67, and his wife Yu Zhou, in her 50s, were found dead at their home in Riverwood, south-west Sydney, on Sunday afternoon.

Police were called to the Union Street address at around 2pm and discovered Mr Li’s body inside his truck, which was parked in the street.

His wife’s body was later found inside the house.

Neighbors say the couple had lived in the house for about a decade, but, like many residents on the street, they mostly kept to themselves away from the occasional waves.

Zheng Hong Li and his wife Yu Zhou were found dead inside their Riverwood home (pictured) on Sunday

Police officers remained at the scene Monday morning as they investigate the alleged domestic violence incident.

They were known locally by the nicknames “Park” and “Grace”.

A family living a few doors down described Li as ‘very hardworking’ and his wife as ‘beautiful and soft-spoken’.

‘I’m shocked. He was a very good man,” said the neighbor.

“I would see him every day when I walked down the street.”

The family said the couple, originally from China, have a daughter who is about 18 years old.

Another neighbor said the couple were very nice and Ms Zhou often said hello when they bumped into each other.

She said she often saw her walking to and from the train station as Grace did not drive.

A coroner’s officer sweeps Mr Li’s truck from the road where he was found dead at the weekend

Detectives were seen going in and out of the property on Monday

An upset neighbor (pictured) said he would see Mr Li outside his house every day

The last time I saw him was last week. She waved on her way back from work,” said the woman.

“She worked in a duty free shop at the airport. The girl recently moved to Hurstville.

“It’s very sad.”

Detectives are investigating whether the incident was domestic violence-related, with officers first scouring the home for evidence on Monday.

Forensic officers could be seen leaving the house with containers, before loading them into the back of a vehicle.

St George’s detectives are leading the investigation and are being assisted by the State Crime Squad’s Homicide Squad.

Anyone with information about this incident is asked to call Crime Stoppers.

For confidential 24/7 support call Lifeline on 13 11 14 or 1800 RESPECT