Siti Aisyah's involvement in the "prank show" began when she was picked up by a taxi driver named Kamaruddin Masiod early one January morning outside a bar, Wan Azirul Nizam said.

Kamaruddin told the Indonesian woman about a YouTube prank show to be aired in Japan and offered to introduce her to the organizer.

In his testimony, the police investigator said Siti Aisyah is believed to have met with Kamaruddin and a man named James, or "the Japanese," later the same morning at the Pavilion shopping mall in Kuala Lumpur.

"(At the meeting) Siti Aisyah was shown a video of the prank, and she performed it three times," Aisyah's defense lawyer Gooi Soon Seng said in his statement to the press.

But the man she knew as "James" is believed to be a North Korean, Ri Ju U, according to details provided to the court and by the lawyer for the defense.

Investigator Wan Azirul Nizam said the taxi driver had testified to police he'd seen Siti Aisyah performing the pranks outside the mall. The investigator was pressed as to how long before the murder the first pranks took place, but he said he couldn't remember.

The older Kim was at Malaysia's international airport in Kuala Lumpur to board a flight to the Chinese administrative region of Macau when the women are alleged to have killed him.

If found guilty, the two young women face a likely death sentence. The trial is due to resume in just under two weeks, on February 8.