An Australian man linked to a fatal shooting in Bali has had his prison sentence extended following a decision by Indonesia’s Supreme Court. Darcy Francesco Jenson, 28, a Sydney plumber formerly educated at a private school, was sentenced to 18 years in prison for his role in orchestrating the killing of 32-year-old Melbourne father Zivan Radmanovic.

The incident occurred in June last year at the luxury villa Casa Santisya 1 in Badung, Bali. Radmanovic was shot and killed during a gangland-style attack carried out by three Australians. Radmanovic was fatally wounded by Paea I Middlemore Tupou, 27, who received a 17-year term after his appeal was partly successful. The third man involved, Mevlut Coskun, 23, was sentenced to 16 years, also reduced from an initial 18 years following his appeal.

The three men had originally been charged with premeditated murder, the charge carrying a maximum penalty of death under Indonesian law. The case was referred to Indonesia’s Supreme Court after all three lodged appeals against their prison terms, which were previously handed down by the High Court.

Court proceedings revealed that Coskun and Tupou acted under orders from a figure described as a “Mr Big” to attack Melbourne underworld figure Sanar Ghanim, who was leasing the villa where the shooting took place. In the course of the assault, they encountered Radmanovic and his partners, Daniella and Jazmyn Gourdeas, who had gathered at the villa to celebrate Jazmyn’s 30th birthday. Coskun admitted to shooting Ghanim, who survived, while Tupou confessed to firing the shot that killed Radmanovic.

Following the Supreme Court’s ruling, Jenson, described in court as a “fixer” who facilitated the attack, was given the longest sentence among the trio. Their lawyer, Rahul Singh, stated that they respect the court’s decision but are considering whether to seek further review of the case.