Detective-Inspector Mark Trenwith told reporters the seized car was owned by the arrested woman's family and was at the carwash at the time of the murder. "The post-mortem yesterday confirmed the cause of death was multiple gunshot wounds," he said, adding that the weapon had not been recovered. We do not believe the murder is related to drugs or any other illicit (activity). He said police are continuing to view CCTV footage from the area. "We believe that will form an important part of our case in regard to the arrest of this woman," Insp Trenwith said. Police could not rule out the possibility of further arrests.