Queensland police do not believe the death of a Toowoomba man last month and the fatal stabbing of his relative on Sunday are connected.
Debbie Combarngo, 37, had been visiting a Wilsonton unit when she was stabbed in the chest in an alleged group attack just after 2pm.
Detectives investigating the death of Ms Combarngo were reportedly looking into whether the incident was related to the unexpected death of relative Michael Hall last month.
But Detective Inspector Lew Strohfeldt on Wednesday told reporters Mr Hall's death was not being treated as suspicious.
"(His death has) no real role in the investigation into the death of the victim in this situation," Det Insp Strohfeldt said.
"There's no direct issue there."
Asked if her death was an act of revenge, he said: "At this point in time we're not focusing on that, we're focusing on the investigation in relation to the death.
"I know there is consultation with community members being conducted by other members of our department."
Six women and three men, aged between 23 and 34, have been charged with assault occasioning bodily harm and entering a dwelling with intent.
Det Insp Strohfeldt said authorities were yet to determine whether one or more people killed Ms Combarngo.
He could not say whether those people were in custody.
"We have an open mind in relation to that," he said.
Det Insp Strohfeldt was unable to say what Ms Combarngo was stabbed with.
Police have called on anyone in the Wilsonton area between 1.30pm and 2.30pm that day, and who may have witnessed a group of people in that area, to come forward.