Man who allegedly fatally stabbed daughter and fiancée suffers mental disorder, lawyer says

Blake Matthew Seers, 38, allegedly killed his fiancée, Kate Paterson and the couple's daughter, April, at their home in Logan on Thursday.

A man who allegedly stabbed his partner and their baby daughter to death suffers from a mental disorder, a court has been told.

Blake Matthew Seers, 38, allegedly killed his fiancée, Kate Paterson and the couple's daughter, April, at their home in Logan last Thursday.

The tragedy was discovered after Seers was struck by a car not far from the grisly crime scene, 30 kilometres south of Brisbane.

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Police were trying to contact his next of kin when officers discovered the bodies of his fiancée and baby girl in the family's home.

Both died from critical injuries from an edged weapon, police said at the time.

Witnesses raised the alarm after seeing a man covered in blood running along a footpath before he was hit by a black utility about 300 metres from the family home.

A trail of blood was marked along the footpath, leading from the house in the hours after the killings.

Seers remains in hospital and did not appear as two charges of murder were mentioned in Brisbane Magistrates Court before being remanded to the Beenleigh court on March 25.

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CCTV has emerged capturing some of the final moments of a Logan mother and her baby girl hours before they were found dead south of Brisbane yesterday.Kate Paterson, 38, and her one-year-old daughter, April, were found dead with stab wounds in the family's Bannockburn home after the child's father, 39-year-old Blake Seers, was struck by a vehicle just a few hundred metres away.

Defence lawyer Nicholas Andrews said Seers had been diagnosed with schizoaffective disorder and would need medical support in custody.

The disorder is a chronic mental health condition combining schizophrenia symptoms, including hallucinations and delusions, with episodes of depression and mania, according to Queensland Health.

Outside the court, Andrews said it was a sensitive matter.

"Our thoughts are with those families and people affected by this tragedy," he said.

"But at times like this, I just need to remind myself that there is a job to do.

"There are mental considerations here, and we will be ensuring that those are raised through the appropriate legal channels."

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