Si Yi Chen

Alleged trafficking conspiracy It is unclear how Chen, aged 20 years, from Doonside in Sydney, On or about 8 April 2005, Chen arrived in Bali with Matthew Norman and checked into the White Rose Hotel. It was reported that Chen and Norman "hardly ever left their room".

On 14 April, Chen, Norman, Lawrence and Martin Stephens checked into Adhi Dharma hotel, with Tan Duc Thanh Nguyen arriving in the same hotel two days later. It was reported that police took the room next to Chen and Norman.

Arrest in Indonesia Approximately 20 minutes after checking in, Chen was arrested at the Melasti Hotel in Kuta on 17 April 2005 with Nguyen, Sukumaran and Norman. Indonesian police claim the group were in possession of of heroin and bundles of plastic wrapping, Elastoplast tape, and a set of scales, indicating involvement in a plan to transport drugs to Australia. saying: "I didn't see him for two weeks. I never knew he was overseas. I am very surprised to hear this news."

Criticism of Australian Federal Police tipoff

Lee Rush, the father of Scott Rush, a fellow member of the Bali Nine, said that he contacted the Australian Federal Police (AFP) prior to the commission of the offence, fearing his son was travelling to Bali and would commit a drug-related crime. Rush senior claims then to have received assurances from the AFP that they would tell his son he was under surveillance to dissuade him from going through with the crime before the group's departure from Indonesia. Scott Rush's lawyers said he was never contacted. It was revealed that the AFP alerted Indonesian police that a crime was to be committed approximately two weeks before the arrests, and had commenced an investigation about ten weeks prior to the arrests. and there was criticism of the role of the AFP in protecting the interests of Australian citizens. Commenting on the matter at the time, AFP Commissioner Mick Keelty was reported as saying:

Rush took action in the Federal Court of Australia against the AFP for breach of the bilateral treaty between Indonesia and Australia when information was handed by the AFP to the Indonesians. Rush's case claimed that such information should only be released by the Attorney-General. However, the Commonwealth Government maintained that the treaty only applies after a suspect is charged. The application was dismissed by the Federal Court in January 2006.

Criminal trial Criminal trials for the accused commenced in the Denpasar District Court on 11 October 2005. Chen, Nguyen, and Norman, all arrested at the Melasti Hotel and earning the numeric epithet, The Melasti Three, were tried together, with the remaining six defendants tried separately. During the trial it was reported that Chen denied any involvement in the alleged drug trafficking operation. Chen was quiet throughout proceedings and at times could barely be heard by panel judges.

In December 2005, it was reported that tensions were building between the Bali Nine drug mules and Sukumaran and Chan. Several days later, lawyers acting for some members of the Bali Nine initially sought the support of the Director of Public Prosecutions to intervene and lay charges for conspiracy to import drugs, so that the nine could be extradited and charged under Australian law. However, the judges hearing the trial matters in Bali called for Australia not to intervene in Indonesia's right to impose capital punishment. Lawyers acting for Stephens, one of the Bali Nine, claimed that the fairness of his trial was in jeopardy following comments made in the media by Indonesian Foreign Minister Hassan Wirajuda that Australians should be prepared for members of the Bali Nine to receive a death sentence, if found guilty.

Sentencing and appeal

In pre-sentence proceedings, Chen's father, Edward Chen, was reported as saying:

During his final plea on 2 February 2006, Chen said:

On 15 February 2006 Chen was sentenced to life imprisonment.

The Australian Prime Minister John Howard was reported as commenting:

A subsequent appeal to the Indonesian Supreme Court to have the sentence reduced suffered a shock on 6 September 2006 when the death penalty was imposed on Chen, Nguyen, and Norman. with some media reports that the Melasti Three could be released before 2020, subject to good behaviour.

Additional arrests In February 2006, as verdicts and sentences were handed down in the trial of the Bali Nine, additional arrests were made in Australia.

Prison life Chen served his sentence in Kerobokan Prison where he worked in partnership with a local jewellery company Yin Jewellery to establish Mule Jewels, a rehabilitative silver making programme that offers inmates a trade skill that they are able to use upon release, and gives inmates some constructive and therapeutic work. Chen has stated online that he is sharing a cell with an Australian and a Japanese person. "It's comfortable enough for the three of us but it is dirty." He has since become a Christian. He will not be required to serve any further prison time in the country.