Gruesome video footage of the bodies of former WA academics Del Weston and Gavin Mooney lying at the scene of their killings has been played to a jury in Hobart this morning.
The police "walk-through" video of the isolated Mountain River property shows the couple lying in dark stains of blood at the confronting scene where their son and stepson, Nicolau Francisco Soares, is alleged to have committed their murders.
The footage played in the Tasmanian Supreme Court shows the couple lying amid scattered plates, cutlery and food from the dinner they were eating before the attack.
Blood stains spatter the walls of the television room, with droplets reaching as far as the ceiling.
The claw hammer, its head snapped from its wooden shaft, and block splitter axe used to inflict the catastrophic and fatal head injuries lie discarded on the floor.
Mr Soares, 29, does not deny he inflicted the fatal injuries on his mother and stepfather on December 18, 2012, but has pleaded not guilty to two counts of murder on the ground of insanity.
The court has been told he has a diagnosis of schizophrenia and had battled the symptoms of his illness for years.
Earlier today, disturbing and graphic autopsy photographs of the head injuries inflicted on the couple were shown to the jury of seven women and five men in the double murder trial.
State forensic pathologist Christopher Lawrence described eight separate head wounds suffered by Dr Weston and 13 head injuries inflicted on Professor Mooney.
Dr Lawrence described wounds to each of the academics which caused massive skull fractures and damaged their brain stems.
He said such injuries would likely have caused instantaneous or rapid death.
Dr Lawrence also described defensive wounds on Dr Weston's knee and Professor Mooney's hand.
Mr Soares' brother, Alexander Soares, and half-sister, Katherine Weston, left the court before the disturbing forensic evidence started.
The Crown has finished its case and the defence is expected to call a psychiatrist tomorrow morning.