Convicted fraudster Stephen Seddon, 46, had once before tried to murder his father, Robert Seddon, 68, and mother, Patricia, 65, by driving into a canal with them strapped in the back seats in a faked road accident.
Seddon then "played the hero" in the aftermath of the "accident" after aborting the murder plan when bystanders went to their aid in the submerged car.
But after that plan failed, four months later he shot the couple to death with a sawn-off shotgun at their suburban home in Sale, Greater Manchester.
His parents had made him sole beneficiary of their £230,000 estate in their will - and paid with their lives.
Today, the father of three, from Benevente Street in Seaham, County Durham, was convicted of two counts of attempted murder on March 20 last year and two counts of murder on July 4, after a five-week trial at Manchester Crown Court.
A man who killed his own parents to collect an inheritance is facing life in jail after being found guilty of their murders.
Stephen Seddon, 46, from Seaham, County Durham shot his mother and father so he could inherit £230,000.
They both died on July 4th 2012 after Seddon used a sawn-off shot gun to kill them at close range.
The jury found him guilty after hearing Seddon had an "insatiable thirst for cash."
After becoming unemployed, his parents Bob and Patricia Seddon, from Sale, Manchester helped him financially.
They gave their son a £40,000 lump sum and bought him a house to keep a roof over his head.
But that wasn't enough for Seddon.
In March 2012 he tried to kill them by faking a road accident and driving a car into a canal in Manchester with them strapped in the back seats.
They all survived and he was hailed a hero for their rescue.
Weeks later he would shoot them at close range before planting the gun on his father's lap to make it look like a murder-suicide.
Known locally as Nic, Seddon had worked as a salesman across the North East. But he also had a string if previous convictions including theft and obtaining goods by deception.
After a five week trial Seddon was found guilty of two counts of attempted murder and two counts of murder.
He will be sentenced tomorrow morning.
A man from County Durham has been found guilty of killing his parents.
46-year-old Stephen Seddon was found guilty at Manchester Crown Court today of the murder of his parents over a £230,000 inheritance.
A County Durham man accused of killing his parents has denied that he considered killing his "disabled" nephew, a court has heard.Read the full story ›
A man accused of killing his parents for his inheritance has said he was on a drugs run for crime gangs on the day of their murders.Read the full story ›
A County Durham man, accused of killing his parents, has admitted drug-running for organised gangs across the north of England.
Stephen Seddon described going to Manchester on two occasions to deliver drugs and pick up cash.
He is on trial for the murders of his parents Robert and Patricia.
Watch the full report below.
A court has been told that a man from County Durham, who is accused of murdering his parents, had boasted about what he was going to do with his inheritance in the weeks before they died.
Robert and Patricia Seddon were found dead at their home in Sale, Greater Manchester, last summer.
Their son Stephen denies killing them to get his hands on an inheritance of more than 200,000 pounds.
Manchester Crown Court heard that he had told teachers at his son's school in Seaham that he was planning to spend the money on him.
A court has heard how a man from County Durham tried to kill his parents for a £230,000 inheritance by allegedly driving them into a canal.
Stephen Seddon staged the "accident" by driving into a canal with his parents and nephew all aboard the BMW car on March 20th of last year, the court heard.
Seddon hired a BMW and drove from his home in the North East on the pretext of taking his parents and nephew out for a meal.
He later told police a brick in the road may have caused him to swerve off the road and into the water.
Ruth Carroll told the court she was driving along Canal Road in Timperley, south Manchester, when she saw the vehicle on the night of the alleged attempted murder.
Seddon denies two counts of murder and two counts of attempted murder.
"The lights sort of went off to my left and I saw the side of the vehicle, then it seemed to go up and it went into the canal."
The trial of a County Durham man accused of murdering his parents has continued today.
A court has heard that - just a day before the shooting - Stephen Seddon's father told his doctor that he thought his son had tried to kill him.
Stephen Seddon, from Seaham, denies murdering his parents in Greater Manchester, and denies two counts of attempted murder.
Watch the full report below.
A father told his GP he thought his son had tried to kill him just 24 hours before he was killed with a shotgun, a court has heard.
Robert Seddon survived after his son Stephen allegedly drove a car into a canal with his parents aboard, in a fake road crash designed to kill them for their will.
Robert Seddon later confided in his GP he now believed the canal "accident" four months earlier had been a deliberate attempt to kill him, the court heard.
The next day Stephen Seddon went to the house in Sale and shot both parents at close range with a sawn-off shotgun, it is alleged.
The day before Mr Seddon and his wife Patricia, 65, were shot dead he had an appointment with his GP, the court heard.
Seddon, from Seaham, denies two counts murder and two counts of attempted murder over the canal incident earlier that year.
"He had previously expressed a view the canal incident was an accident.
"By this time he was expressing his concerns to his GP that his son had tried to kill himself and his wife when his son drove into the canal."