45 year-old Michael Frank Hartung faces 6 charges for allegedly organizing sex tours overseas involving minors and for possession of over 200 obscene films.
Hartung is a Singapore permanent resident. He met 2 Singaporean men in September 2015 and promoted his "sex tours". In April 2016, he met 2 more Singapore PRs to do the same.
Investigators raided his home and seized over 200 obscene and uncensored films.
He is on $15,000 bail paid for by his wife. He will appear in court again on 28 February.
If convicted, he may face up to 10 years in jail and a fine.