The person believed to have shot dead three people on a rural Queensland property is in custody as details of a potential motive for the killings slowly come to light.
A 59-year-old man is expected to be charged over the incident which killed three people from the same family, as a fourth recovers in hospital from a gunshot wound to the stomach.
Two other people who were being held by police, understood to be family of the man in custody, have been released.
