Lam Chang Nam also charged for allegedly demanding an RM30,000 ransom from Koh's son.
A year on from his abduction, the pastor's family vows to keep the case 'alive'.
The girl, 7, was taken by her father from her school in Argentina in June last year and was last seen at different locations in Malaysia.
UPDATED 1.20PM | IGP says two of them detained for posing a security threat to Malaysia.
Khalid Abu Bakar also reiterates urgings for the media and NGOs to keep their 'mouths shut' on the case.
The RM100k reward still stands for those who can provide information leading to Koh's safe recovery, his wife says.
Wife says she's more reassured that police are doing their best, even if there is no significant lead yet.
A Japanese association says N Korea may also be behind the disappearance of four women, including four Malaysians, in 1978.