The perpetrator of the killings was
Raina Mersane Ina Thaiday, also known as
Mersane Warria, a 37-year-old
Torres Strait Islander woman who had no previous criminal history. She was a
single mother to seven of the children and also the aunt of the eighth. She reportedly had untreated mental health issues and was under financial stress at the time of the killings. She was said to be a long-time
cannabis user, but had recently banned alcohol and drugs from the house. She was also said to have developed extreme religious views, including making public proclamations about "Papa God", and to have attended multiple churches "seeking counsel". On 21 December 2014, Thaiday was charged with eight counts of murder. She was subsequently moved to a mental health facility in
Brisbane, with a
preliminary hearing to occur in Cairns on 30 January 2015. In April 2017, Queensland's Mental Health Court ruled that Thaiday was of "unsound mind" at the time of the killings, and thus (under Queensland law) not criminally responsible. She was reportedly diagnosed with "psychosis stemming from undiagnosed
schizophrenia". within a secure ward. It was reported around the same time that she "had been slow to respond to treatment and was at high risk of relapsing". ==Aftermath==