Reports: Accused Sought Help At Hospital Hours Before Alleged Killings

Teancum Vernon Petersen-Crofts is accused to murdering his mother, brother and sister.

The teenager who allegedly killed three members of his family sought help at a hospital just hours before he committed his alleged crime according to a report.

Teancum Vernon Petersen-Crofts took himself to St. John of God Midland public hospital emergency department seeking medical help for a health condition.

WAToday reports that Petersen-Crofts was in a 'psychotic state' when he arrived at the hospital, however he was taken home.

WA Mental Health Minister Roy Cook said that he was unable to confirm that nature of and treatment given to Petersen-Crofts.

"I can't confirm any of the nature of the medical treatment of the efficacy of that treatment. It is simply inappropriate for me to make a comment in relation to the circumstances that led up to that event," Cook told media on Tuesday.

Just hours later his eight-year-old brother Rua and 48-year-old mother Michelle were found dead at their Ellenbrook home.

Petersen-Croft's 15-year-old sister Bella was found critically injured at the scene and died en route to hospital.

Michelle Petersen and he children Bella and Rua were killed on Sunday. Images: Facebook

The 19-year-old was later charged with the alleged murders of his three family members and it is believed he lived at the property with his mother and siblings.

"I cannot answer any questions in regard to the 19-year-old man who is now accused of murdering three people," Commissioner Chris Dawson told reporters on Tuesday.

"That is properly for the courts to deal with. I will not be making any comment about the accused's condition."

Dawson also said that the investigation into the deaths is complex and will take some time.

"Well, with the deaths of three people in these circumstances, that does bring its own complexity," he said.

Petersen-Crofts appeared at Midland Magistrates Court on Monday where he gave a bizarre rant in court, blaming an unknown person called "Griff" for the alleged murders.

He went on to say he had been living with 'Griff' for two months, and said he "had to leave because I was that scared he was going to kill me. Mama told me to save myself."

The 19-year-old was remanded in custody at a psychiatric centre until he reappears in court on July 23.

Petersen-Crofts will reappear in court on July 23. Image: Facebook

Assistant Commissioner Paul Steel told reporters on Sunday that the crime scene is complex and one of the most gruesome he had been called to.

“A senior homicide detective squad officer said to me that it is potentially the most horrific crime scene that he has ever been called to,” Assistant Commissioner Steel said.

"This is a terrible tragedy for the family involved, for their extended family and for those first responders who were forced to attend ... my heartfelt condolences go out to all of those who have been affected by this tragic incident."