Human blood was found throughout the house Noel Ingham shared with his accused murderer Darren Gale, the Burnie Supreme Court heard on Wednesday.
Although crown prosecutor Jackie Hartnett has not offered any evidence of how or where Mr Ingham died, she called forensic scientist Louise McMahon to the stand to confirm many locations in the West Ulverstone unit tested positive for human blood.
Dr McMahon told the court she and forensic police investigators spent days combing over the unit in detail and testing several locations to confirm the presence of blood.
She said there were patches of blood in the unit's bedrooms and bathroom, a patch on the living room floor and even on the ceiling.
However, Dr McMahon has not confirmed whether or not any of the bloodstains are a DNA match with Mr Ingham or Mr Gale, or whether their presence is indicative of a crime scene.
Mr Gale's defence lawyer Greg Richardson told the court in his opening statements the crown has no evidence of how Mr Ingham died, or that Mr Gale caused his death.
Mr Ingham was found decapitated and buried in a clandestine grave in bushland at Dulverton in November 2016, and covert footage has shown Mr Gale in the area in the weeks prior to the discovery of the body.
In her opening statements, Ms Hartnett said the crown's case is reliant on a mass of circumstantial evidence, including testimony from more than 60 witnesses including neighbours, retail staff, police and forensic scientists.
Mr Richardson has repeatedly said he will not be challenging much of the evidence presented by the crown, as he believes it does not prove Mr Gale was responsible, beyond reasonable doubt, for Mr Ingham's death.
"Circumstantial evidence has to prove there is no reasonable inference consistent with innocence," he said.
The court also heard evidence from a handwriting expert that notes signed with Mr Ingham's name in the weeks after he was last seen were written by Mr Gale.
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