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Gammy's dad's 'child-indecency conviction'

Baby Gammy situation only gets more complex amid reports his West Australian father was convicted in 1998 of an indecent act involving a child under 13.

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West Australian child protection services have been called in by police to investigate the "suitability" of the Australian biological father of baby Gammy following the public disclosure of sex offences against children.

A WA Department of Child Protection and Family Support spokesman told Fairfax Media it was contacted by police on Monday night to examine the circumstances of the family following media reports of the father having been convicted of child sex offences..

Gammy is fed by his surrogate mother Pattaramon Janbua at a Thai hospital.

Gammy is fed by his surrogate mother Pattaramon Janbua at a Thai hospital. Photo: Damir Sagolj

The department confirmed this afternoon it had commenced an assessment of the safety and wellbeing of Gammy's sister.

Fairfax Media has seen documents which contain the child sex charges against the man who allegedly abandoned baby Gammy with his surrogate mother in Thailand and took his twin sister.

The Supreme Court of Western Australia court documents list the 1997 charges against the man who has returned from Thailand to Bunbury, in WA’s South West, with his wife and a baby girl.

The man appeared in Bunbury court to face charges of unlawfully and indecently dealing with a child under the age of 13 yearsand five counts of indecently dealing with a child under the age of 13 years.

The man was given a three-year jail term, with parole, for sexually molesting two girls under the age of 10.

He had pleaded not guilty to six charges of indecently dealing with a child under 13.

Fairfax Media revealed last week the couple are accused of taking home an infant girl born to surrogate mother Pattharamon Janbua but abandoning her twin brother Gammy, who was born with Down syndrome and a hole in the heart.

The biological parents have not been named but the media is focusing on an address in Bunbury.