The Adelaide Advertiser is reporting detectives are probing if the highly-addictive drug played a part in the death. A photograph has emerged appearing to show some kind of smoking pipe was taken from the scene in an evidence bag by police.

Cy Walsh, who on Friday was charged with his father's murder, has been transferred from Flinders Medical Centre overnight to secure mental health facility James Nash House.

He was remanded in a bedside hearing that was phone-linked back to the Adelaide Magistrates Court on Friday afternoon. His next court date is in September.

His mother, Meredith, was being treated at the same hospital as her son where she was taken with a minor wound to her leg.

His sister, Quinn Walsh, is flying back from the United States where she was on holidays before the tragic news of her father's death broke.

Cy Walsh, a former Immanuel College student, was arrested less than two kilometres from his family's home near a school friend's house where he regularly stayed.

In that same street, First Avenue, is a collection of units. Police are investigating if Cy Walsh is linked to one of the units, known to residents as a place where drugs were being regularly used.

The unit is boarded-up, its windows had been smashed in an attack involving an axe just two weeks ago.

"A man had smashed four windows up there," one neighbour said. "When the arrest happened (on Friday) we thought, 'Here we go again'."

Police said Cy Walsh was not responsible for the axe incident.

Witnesses to his early-morning arrest heard elevated voices, car doors slamming, but bizarrely, the sound of a man laughing before they ventured outside their homes to see what was happening.

"He was lying on the ground over there," a neighbour pointed across the street to a driveway that still had specks of dried blood on it.

"He was pretty quiet."

More to come

The Sydney Morning Herald