The killing sparked a diplomatic row between Malaysia and North Korea which saw both countries banning each other's citizens from leaving and withdrawing their ambassadors.
It was reported that Kim was at KLIA2 to board a flight to Macau when two women approached him and suddenly wiped his face with toxic liquid which was later identified as the VX nerve agent. Malaysian authorities said two women.
Two women accused of assassinating the half-brother of North Korea's leader risk being subjected to a "trial by ambush", a defence lawyer said Thursday, accusing the police of failing to share key evidence.
Rival South Korea accuses the North of masterminding the death of Kim, the estranged half-brother of North Korean leader Kim Jong Un.
Malaysian police have identified four other North Koreans as suspects.
"All of us believe she was cheated", he said. He said he has been waiting for police to provide surveillance video and statements from three North Korean men who were questioned and released.
The magistrate court was set to hear a prosecutors' request that the two women be tried jointly in a higher court, but the hearing was deferred to May 30 after the prosecution asked for more time to collect documents.
"There shall be no trial by ambush", he said. "There must be some communication breakdown somewhere".
Siti's lawyer said Tuesday that his client was duped into thinking she was playing a harmless prank on an unsuspecting traveler. If found guilty, they could face the death penalty, which is carried out by hanging in Malaysia. They are believed to have left Kuala Lumpur for Pyongyang on the day of the killing. And another three who stayed inside their country's embassy in Kuala Lumpur to avoid questioning by police were allowed to fly home late last month after Malaysia struck a surprise deal with Pyongyang to ease tensions. "They (the defendants) are already scapegoats".
"We've lost an opportunity to cross-examine them ... I am just waiting for the North Koreans to send back the four (suspects) to us", he said.
Aisyah and Huong have told diplomats from their countries that they had believed they were carrying out a prank for a reality television show, and not a murder.
They practiced at malls, hotels and airports, he said.
Aishah was paid about $100-$200 for each prank and hoped the income would allow her to stop working as a social escort, Gooi said.
Tran Huy Hoang, a young Vietnamese man who attended the hearing and described himself as a cousin of Doan, told AFP news agency "she loves to travel and party but she never do anything violent".