The issue of the meeting was raised by lawyer Gooi Soon Seng representing the accused from Indonesia, Siti Aisyah, 26, during cross examination in the trial of Siti Aisyah and Doan Thi Huong, 29, who were charged, together with four men still at large, with murdering Kim Chol, 45, at the departure hall of the airport at 9am, Feb 13 previous year.
He was responding to a question from the defense attorneys of two women charged with smearing a deadly nerve agent, VX, on Kim's face as he passed through a busy Kuala Lumpur airport in February previous year. People are simply killed if they believe in Jesus.
They said they thought rubbing Kim Jong Nam's face was part of a prank for a television show.
North Korea has denied having Mr Kim murdered, but police have told the court that several North Korean men helped plan the attack, including a man identified by one of the women as the one who hired her to perform pranks. They face the death penalty if convicted.
Kim Jong Nam arrived in Kuala Lumpur from Macau Feb. 6 a year ago, according to Wan Azirul Nizam Che Wan Aziz, the police official investigating the murder.
The Malaysian court hearing the case against two women who are accused of murdering Kim Jong-nam heard this week that he travelled to the resort island of Langkawi and met with a Korean-American agent on February 9.
However Azirul testified that he did not know where and when the prank took place.
The question was based on an article in the Japanese newspaper Asahi Shimbun, which reported the meeting in Langkawi last May.
Mr Kim had also used his laptop and USB drive for the last time that day, according to a police computer forensics report.
Kim Jong Nam also had $138,000 on him when he was killed, but police said that the cash was unrelated to the meeting with the American.
Pyongyang has denied accusations by South Korean and USA officials that North Korean leader Kim Jong Un´s regime was behind the killing. Kim Jong Nam said it was because he was reform-minded.
But he reportedly fell out of favour in 2001 after he was caught trying to enter Japan on a false passport.
North Korea appears to have reached out to South Korea after being "spooked" by US President Donald Trump's threats of a military strike, a former Central Intelligence Agency official said Monday. He was exiled from the country in the early 2000s.
News reports had previously mentioned Ri as the youngest of eight North Korean men previously wanted by the Malaysian police for suspected involvement in the killing.
North Korea has a long history of ordering killings of people it views as threats to its regime.