One, a scientist who had been living in Kuala Lumpur for a year, is in custody, but three others, including the diplomat, are believed to be at large in Malaysia.
In June 2021, following a one-month-long absence from the public eye, outside observers noted that Kim had lost considerable amount of weight.
In 2014, a landmark suggested that Kim could be put on trial for.
Nur Ashikin Othman testified that Kim's showed the effects of being exposed to the poison.
He died in the ambulance on the way to Putrajaya Hospital, Fadzil added.
Kim also has had top officials with ties to China brutally assassinated with packs of dogs or , according to reports.