Doctor: Kim Jong Nam's underwear soiled, pupils contracted

Vietnamese Doan Thi Huong, right, is escorted by police as she arrives for a court hearing at the Shah Alam court house in Shah Alam, outside Kuala Lumpur, Malaysia, Monday, Nov. 27, 2017. Huong and Indonesia Siti Aisyah are accused of killing Kim Jong Nam, the estranged half brother of North Korean leader Kim Jong Un. (AP Photo/Sadiq Asyraf)
CORRECTS NAME OF NORTH KOREAN LEADER - Vietnamese Doan Thi Huong, second from right, sits in a car as she arrives for a court hearing at the Shah Alam court house in Shah Alam, outside Kuala Lumpur, Malaysia, Monday, Nov. 27, 2017. Huong and Indonesia Siti Aisyah are accused of killing Kim Jong Nam, the estranged half brother of North Korean leader Kim Jong Un. (AP Photo/Sadiq Asyraf)
CORRECTS NAME TO JONG UN - Indonesian Siti Aisyah is escorted by police as she arrives for a court hearing at the Shah Alam court house in Shah Alam, outside Kuala Lumpur, Malaysia, Monday, Nov. 27, 2017. Aisyah and Vietnamese Doan Thi Huong are accused of killing Kim Jong Nam, the estranged half brother of North Korean leader Kim Jong Un. (AP Photo/Sadiq Asyraf)

SHAH ALAM, Malaysia — A Malaysian doctor testified Monday at the trial of two young women accused of murdering the estranged half brother of North Korea's leader that the victim's pupils contracted and his underwear was soiled with feces, both signs of poisoning.

Siti Aisyah of Indonesia and Doan Thi Huong of Vietnam, the only suspects in custody, pleaded not guilty at the start of their trial on Oct. 2. They were accused of smearing the banned VX nerve agent on Kim Jong Nam's face at a crowded airport terminal in Kuala Lumpur on Feb. 13, killing him within two hours.

Nurliza Abdullah, one of two government doctors who conducted the autopsy on Kim's body, told the court that the pupil constriction and the large amount of excrement found in Kim's underwear both pointed to poisoning.

"Based on our autopsy and the lab test results, the cause of death is acute nerve agent VX poisoning," she said, concurring with a colleague who had given similar testimony earlier in the trial, when the autopsy report was presented to the court.

Nurliza, however, agreed with the defense assertion that the post-mortem alone wasn't able to confirm VX as the cause of death, and that the autopsy conclusion was based on tests by the chemical department that found traces of the nerve agent on Kim's face and body.

Monday's court session was cut short because the next prosecution witness wasn't ready. The trial will resume Tuesday.

The two women face a mandatory death sentence if convicted. Defense lawyers say they were duped by suspected North Korean agents into believing they were playing a harmless prank for a TV show.

Prosecutors have said four North Koreans conspired with the two women to plot the murder of Kim Jong Nam and fled the country the day of the attack.

South Korea's spy agency has claimed the attack was part of a carefully set plot by North Korean leader Kim Jong Un to kill a brother he reportedly never met.

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