Malaysia Bagus News
Officials have said there is insufficient evidence to charge Ri Jong Chol, and that he will be deported over immigration offences.
Meanwhile an arrest warrant has been issued for a North Korean airline employee accused of the murder.
Malaysia has condemned the use of the powerful VX nerve agent in the 13 February attack.
Mr Kim, the estranged half-brother of North Korean leader Kim Jong-un, died at an airport in the Malaysian capital, Kuala Lumpur.
Two women were charged on Thursday with killing him by smearing his face with VX, a banned chemical weapon.
Doan Thi Huong from Vietnam and Siti Aisyah from Indonesia have said they thought they were taking part in a TV prank. They have yet to make a formal plea in their case.