Ashley Coulston

Coulston grew up on his family's dairy farm in Tangambalanga. His family were described as law abiding.[1][2] On 19 April 1971 Coulston, aged 14 years and armed with a .22 rifle, abducted from a house next to the Tangambalanga school, two female school teachers, Halinka Watson (20) and her colleague Carol Scott (21), whom he had kept under surveillance prior to the abduction.[3][1][4] He stole some money and forced the two women into one of their cars and made them drive him interstate towards Sydney.[1][4] At 5am the next day, the vehicle stopped at a Gundagai roadhouse for food. The women escaped and attracted attention to their situation.[1][2][4] Arrested, Coulston was sent by the Children's Court to Turana Youth Training Centre.[1][4] Publicity of the abductions made the family sell the farm a year or so later and move interstate to New South Wales, buying a dairy in Kyogle.[1][5] Later his father retired, selling the dairy and moving to a property on Brisbane's southern outskirts. Coulston joined his family in Brisbane in 1979.[5]

In 1988, Coulston came to media attention when he attempted to sail his custom built 2.4-metre (8 ft) vessel which he named G'Day 88 from Australia to New Zealand across the Tasman Sea. On 26 January 1988, Coulston left Port Stephens in G'Day 88, a vessel he designed and built himself[6] however he ran into troubles following Cyclone Bola and on 12 March 1988, activated his vessel's emergency beacon. He was rescued by a passing tanker just north of New Zealand's North Island after spending 46 days at sea in stormy weather. The remains of his vessel washed up on the New Zealand shore several months later.[7] He was dubbed "Captain Bathtub".[2]

On 25 October 1988, Coulston attempted his voyage once again sailing from New Zealand to Australia, successfully arriving in Brisbane on 6 January 1989.

In 2000, the Australian Police Journal published an article on Coulston regarding the forthcoming creation of the National Criminal Investigation DNA Database (NCIDD) and that the Queensland Police Service and the New South Wales Police Force were seeking to recover DNA samples from the "Balaclava Killer" and the "Sutherland Rapist" cases to compare with Coulston's DNA.[5] Coulston shared the same rare blood type of group A secretor with the "Balaclava Killer" and the "Sutherland Rapist".[5]

The "Balaclava Killer" had raped several women armed with a sawn-off .22 rifle often while their bound male partner watched in the Gold Coast, Queensland between December 1979 and October 1980.[7] The attacker used a motorbike to leave the scene of one attack.[11] In February 1980, an attack occurred at Tweed Heads, a male partner Jeffrey Parkinson fought back and was shot dead allowing his unharmed female companion to flee.[7][12][13] Coulston had lived with his family in nearby Brisbane since 1979 and in late 1980 Coulston moved from Brisbane to southern Sydney in Cronulla and at times lived in Bexley, Kingsgrove and Oatley between 1980 and 1987.[5]

In the 1980s, in Sydney’s southern suburbs women were attacked by an attacker dubbed the "Sutherland Rapist" and which is now understood by police to be at least two separate attackers.[5][14] One of whom had the blood type of group A secretor who committed offences between 1985 and 1987 in the Sutherland Shire and Hurstville including targeting couples in lovers' lanes bounding their male partners armed with a sawn-off shotgun wearing several disguises.[5][14] In 1986, Coulston was sacked from the company he had worked for since 1980 and he spent most of 1987 and his savings of $10,000 constructing the yacht, G'day 88, in a backyard in southern Sydney.[5]

• The True Crime Database Case File #0133 - "The Balaclava Killer"