After refusing to speak to police in the week after the death, police finally went to residences of the Kahui family on 27 June. At least four family members, including King and an aunt, were escorted to police stations. By 4 July, at least twenty extended family members were questioned, as well as ninety medical practitioners and staff who were in contact with the twins. Forensic scientists removed items such as clothing from the Kahui residences. By September, police said that the family were no longer "stone-walling" their inquiries, but a "prima facie" case had yet to be established. "Sunday News" reported on 17 September that a list of suspects was down to three and an arrest was imminent. This was followed by a police statement nine days later stating that they now knew who was responsible for the deaths. However, other family members could still be charged with related crimes.