As Kim Jong Il's eldest son, Kim Jong Nam was initially seen as the heir-apparent to the late leader of North Korea's regime.
In 2001, Kim Jong Nam was caught at an airport in Japan traveling on a fake passport, saying he had wanted to visit Tokyo Disneyland. He gasped to medical workers that he was "attacked with a chemical spray", a Malaysian official told the Associated Press.
South Korean intelligence officials claimed the regime had been planning his assassination for five years, but did not explain why they thought that was the case.
Kim went to an information desk in Kuala Lumpur International Airport and complained he felt dizzy.
Bong also said the development could mean that, having demonstrated his power, the North Korean leader might now feel he has the latitude to strike a deal with US President Donald Trump without appearing weak.
The suspected assassination of the half-brother of North Korean dictator Kim Jong Un has helped thrust the secretive nation and its secretive first family back into the limelight. "But the Malaysian government hasn't specified [the person]", Jeong Joon-hee, an MOU spokesperson told reporters during a regular news briefing when asked why the South was holding an NSC meeting about the alleged murder.
The aim of the suspected assassination of Kim Jong-nam in Malaysia on Monday would have been to eliminate a focal point for dissidents and potential threat to North Korean leader Kim Jong-un's rule, pundits believe.
Both before and after the announcement, the usually reclusive Kim Jong Nam said in interviews with Japanese media that he opposed hereditary succession, something that not even Mao Zedong had done in China.
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Kim Jong-Nam had been living in exile in the Chinese territory of Macau with his wife under the reported protection from Chinese authorities.
"It seems assured that the person who was killed was Kim Jong Nam", said Jeong Joon-hee, the South Korean Unification Ministry spokesman.
"Most of the reports agreed that what happened has some relation to North Korea, for two reasons".
Born in 1971, Kim Jong Nam was the son of Kim Jong Il and Song Hye Rim, an actress.
Kim was estranged from his half brother, the North Korean leader.
"So there is a possibility of Kim Jong Un directly or indirectly giving orders to get rid of those who could threaten the plan in the long term", he said. While there's no evidence yet linking the murder to Kim Jong Un, South Korean lawmakers and observers of the secretive regime see him as the clear victor.
The two women, suspected to be North Korean agents, targeted 45-year-old Jong Nam as he waited for a flight to Macau, China. Just months before his death in 2010, Seoul authorities arrested two North Korean military officers over one of many plots to kill him.
Speculation and rumors surrounding Kim Jong-nam's killing are rapidly swelling, despite any concrete evidence as to why Jong-nam was killed now.