Private school captain Marco Yandle faces 10 years in prison after admitting helping his father in the alleged ‘execution style’ murder of a homeless father in Kudla, Adelaide

The former vice-principal of a prestigious private school faces up to 10 years in prison after pleading guilty to helping his father allegedly murder a homeless man on their family property.

Marco Yandle, who appeared in the South Australian Supreme Court on Monday, admitted helping his father Keith Yandle evade arrest after the alleged murder of Steven Murphy.

Police allege Keith Yandle executed father-of-two Mr Murphy with an unlicensed firearm at the Kudla property in Adelaide’s outer northern suburbs on the night of February 19, 2023.

The accuser claims the entire incident was captured on the family’s CCTV system.

Marco Yandle leaves the Adelaide Magistrates Court on April 11, 2023 with bracelets on his wrists

A tip led police to the property, where they found a marijuana farm and a grave in an artificial bunker.

Marco Yandle, 20, was initially charged with murder along with his father, but police reduced the charge to aiding his father in arrest or prosecution or disposing of the proceeds of the crime.

The maximum penalty for this crime is 10 years in prison.

Judge Judy Hughes heard the prosecution and defense were waiting for a psychological report on Marco and victim statements.

Stephen Ey, on behalf of Marco Yandle, requested a sentencing date of July 5, which Judge Hughes accepted.

“I’m confident we’ll be ready to go (then),” he said.

SA Police allege Keith Murphy, a father-of-two (pictured), executed overnight with an unlicensed firearm at the Kudla property in Adelaide’s outer northern suburbs

Keith, 46, pleaded not guilty to the murder charge during an earlier appearance at the Adelaide Magistrates Court on February 22, but attempted to plead guilty to the lesser charge of manslaughter

Marco Yandle appeared in court via video link from prison on Monday, but will appear in person on July 5.

Keith Yandle, 46, pleaded not guilty to the murder charge during an earlier appearance in the Adelaide Magistrates Court on February 22, but attempted to plead guilty to the lesser charge of manslaughter.

“Not guilty to your honour, but guilty of manslaughter,” he told magistrate Justin Wickens.

The prosecution told the court it had rejected Mr Yandle’s plea offer and Mr Wickens transferred the case to the South Australian Supreme Court for May.

Family and supporters of Marco Yandle and Mr Murphy filled the court on Monday.

Marco was the vice-captain of Trinity College, a private co-educational school in Gawler that charges up to $7,060 a year for secondary school students.