KPK spokesperson Ali Fikri said Rafael was accused of accepting unlawful gratuities from taxpayers totaling Rp 16.6 billion (US$1.1 million) over the past 12 years and laundering more than Rp 57 billion.

"Our prosecutors are now waiting for [the court] to schedule the first hearing of the trial, during which we will read out the formal charges against [Rafael]," Ali said on Monday.

The antigraft agency launched its investigation into Rafael in early March, after a criminal assault case against his son inadvertently exposed a lavish lifestyle that did not match his wealth profile as an echelon III official.

Read also: KPK names disgraced taxman as gratuity suspect

Suspicions were raised over Rafael’s actual wealth when his son Mario Dandy Satrio, 20, was arrested for assaulting the teenage son of a member of GP Ansor, the youth wing of the nation’s largest grassroots Muslim organization Nahdlatul Ulama (NU). Social media photos and videos of Mario’s extravagant lifestyle and his father’s reported wealth of Rp 56 billion (US$3.6 million) came to light in the days that followed, raising questions about where the money had come from.

Rafael was dishonorably dismissed from his position at the Finance Ministry’s tax office a week after the KPK launched its investigation.

KPK investigators found that Rafael had allegedly been recommending a tax consulting firm he owned, PT Artha Mega Ekadhana, to taxpayers who were being audited for a fee.

Read also: PPATK freezes Rafael-linked accounts on suspicion of money laundering

Rafael is not the first tax official to be implicated in a corruption case. In February last year, Angin Prayitno Aji, a former director at the tax office, was sentenced to nine years in prison for accepting bribes in return for manipulating tax payments in 2016-2017.

Angin is currently standing trial for other charges related to gratuities he allegedly accepted between 2016 and 2019 as well as money laundering charges. KPK prosecutors have demanded a sentence of nine years in prison and a Rp 1 billion fine.

The court is scheduled to deliver a verdict in his case next week.

Arguably the most infamous corruption case involving tax officials emerged in 2010, when authorities investigated junior tax official Gayus Tambunan on allegations of amassing some Rp 100 billion from helping people evade their taxes.

Gayus was found guilty and sentenced to 29 years for multiple offenses ranging from assisting in tax fraud to bribing law enforcement officers to forge passports so he could escape justice in 2010 and then travel abroad after his arrest later that year.

He is also notoriously known for obtaining leave from detention to watch an international tennis tournament in Bali in November 2010.

Gayus is currently serving out his prison term at Gunung Sindur penitentiary in Bogor, West Java, where he was transferred in 2015 after he was spotted having lunch at a Jakarta restaurant when he was supposed to be incarcerated at Sukamiskin Correctional Institute in Bandung.