Jessica Kumala Wongso in Jakarta. Wongso is a suspect in the alleged murder of Wayan Mirna Salihin, who died soon after allegedly drinking coffee laced with cyanide at a restaurant in Jakarta. Picture: AAP

This was the motive for the so-called coffee murder, revealed in Central Jakarta District Court, on the first day of Wongso’s murder trial on Wednesday.

Wongso and 27-year-old Mirna Salihin studied together at Billy Blue College of Design in Sydney but their relationship soured in mid 2015. In January this year Salihin died of cyanide poisoning after drinking a Vietnamese iced coffee ordered for her by Wongso as the two met in an up-market Jakarta coffee shop.

Facebook post from the ‘Justice for Mirna’ page. Indonesian murder victim Mirna Salihin in a family photo with her twin sister. Picture: FacebookSource:Facebook

Prosecutors allege that it was Wongso who lured Salihin to the Café Olivier in the Grand Indonesia shopping mall, months after their falling out and in a bid to kill her.

“In mid 2015 the victim Mirna knew the problems of the love relationship between (Wongso) and her boyfriend. The victim Mirna suggested to the defendant to break up with her boyfriend, who was often rough and a drug user. She asked why date a bad person who doesn’t have any capital,” prosecutor Ardito Muwardi told the court.

Former Australian resident Jessica Wongso (left) with her friend Mirna Salihin. Wongso is accused of murdering Salihin at a Jakarta cafe in January this year. Picture: SuppliedSource:Supplied

“Mirna’s statement apparently made the defendant angry and embittered so that the defendant decided to stop all communication with Mirna.”

Mr Muwardi said that Wongso eventually broke up with her boyfriend and faced several “legal incidents” involving Australian police “so that (Wongso) was even more offended toward Mirna”.

“So to avenge her bitterness the defendant made a plan to kill Mirna.”

Prosecutor Muwadi said that to carry out the plan Wongso then rebuilt communication with her former friend via the Whats App messaging application in December last year when Wongso was on her way from Australia to Indonesia.

Cups of Vietnamese iced coffee used during a police reconstruction of the murder of Mirna Salihin at the Cafe Olivier in Jakarta. Salihin died after drinking an iced coffee laced with cyanide. Picture: SuppliedSource:Supplied

Initially she did not respond but then later Wongso, Mirna and Mirna’s new husband met in a Jakarta restaurant and later, on December 15, Mirna created a What’s App chat group called “Billy Blue Days” involving them and two others who had attended the Sydney college.

Using the chat group, Wongso invited the other three to meet at Café Olivier on January 6.

“While chatting, Mirna said that her favourite in the restaurant was Vietnamese iced coffee.”

Based on this Wongso ordered the drink and paid the bill before Mirna and the others had even arrived.

Facebook photo of Indonesian murder victim Mirna Salihin on her wedding day. Picture: FacebookSource:Facebook

The court heard that after entering Café Olivier and ordered a table for four in the no smoking section, Wongso is alleged to have then left and gone to a nearby shop, Bath and Body Works, buying three soaps and asking for them to be placed in three paper bags.

Wongso came back to the table and the paper bags were then placed on the cafe table in a way that blocked the drinks from the view of the cafe’s CCTV cameras.

Wayan Mirna Salihin, pictured with her husband, died from suspected cyanide poisoning. Picture: FacebookSource:Facebook

Moments after taking her first sip of the iced coffee Mirna collapsed and died later that evening. Prosecutors say that 298 mg of cyanide was found in the iced coffee — more than enough to kill someone of Mirna’s build.

Lawyers for Wongso however said the prosecution’s so-called motive for the crime was illogical.

They said the Australian police matters were only traffic violations. On one occasion her car hit a wall and she had to face court and pay the costs of the fixing the wall.

There is no evidence which shows Wongso placing the cyanide into the iced coffee.

The trial continues.