Cilacap, Central Java – Judges at the Cilacap District Court sentenced a former warden of Nusakambangan penitentiary on Thursday to 13 years in prison.

Marwan Adli, who was also fined Rp 10 billion ($1.1 million) for money laundering and drug dealing, said he would appeal.

"The panel of judges did not take into consideration several key documents, which is what I will base the appeal on," Marwan said on Thursday night after the sentencing.

A panel of judges found Marwan guilty of facilitating the drug dealing of a Nusakambangan inmate, Hartoni, in exchange for a cut of the profits. The sentence handed down was lighter than the 20 years sought by prosecutors, but the fine was much larger than the Rp 1 billion sought.

The case has resulted in the downfall of other officials, including Nusakambangan security chief Iwan Syaefuddin and education chief Fob Budhiyono.

Members of Marwan's family – son Andhika Permana Dirgantara and grandchildren Dhiko Aldila and Rinal Kornial – were also found guilty of involvement in the illegal operation. Marwan's sisters Rita Junita and May Wulandari were implicated in the case as well.

Budhiyono was sentenced to seven years in prison and fined Rp 1 billion. His colleague, Iwan, has not yet been sentenced

Rinal was sentenced to one year in prison and fined Rp 250 million, while Rita and May were both sentenced to two years and six months in prison and fined Rp 250 million.

Andhika was sentenced to two years in prison and fined Rp 50 million, while Dhiko was sentenced to 18 months in prison and fined Rp 100 million.

Hartoni, who is being tried in a separate trial, faces a possible death sentence for masterminding the drug ring.

Known as "the Alcatraz of Indonesia," Nusakambangan Island hosts a maximum security prison that holds convicted murderers, terrorists, drug dealers and those found guilty in high-profile corruption cases. Infamous inmates include the three men behind the 2002 Bali bombings.