These Singaporean parents adopted a baby from Indonesia – now they might lose it.

David and Ali Marcus have yet to receive official confirmation from authorities that he is one of the infants allegedly trafficked. But the BBC found clear signs, which were shared with the couple.

Going through the court documents we found Marcus’ full Indonesian name as one of the trafficked children.

A woman in court who allegedly falsely claimed to be the biological mother of some of the children was listed as Marcus’ mother on Indonesian adoption papers.

Meanwhile, Indonesia’s Interpol branch identified the Singaporean adoption agency that hosted the infants. This is the same agency that introduced Marcus to David and Ali.

The agency is still registered as a direct business in Singapore. The BBC has tried to contact the agency’s owner but has yet to receive a response.

Singapore’s Ministry of Home Affairs (MHA) declined to respond to a BBC query on whether it was investigating the agency and Lee Si Luan’s alleged Singaporean accomplices in Indonesian courts.

The MHA, along with the Ministry of Social and Family Development (MSF), are working with their Indonesian counterparts to assist with investigations, referring to earlier statements to the BBC.

Since news of the current issue broke, lawmakers have repeatedly raised it in Parliament.

One of the adoptions was approved by government officials, who said the adoptive parents were “innocent parties who have done every step of the law.”

But MSF has argued that adoption agencies have a responsibility to ensure their children come from “the right source” and that they must exercise strict control and that adoptive parents must do their due diligence.

David and Ali Marcus say it never once crossed their minds that he could be smuggled.

They said they tried their best to check their own background but were limited by lack of knowledge. After all, it was the first time they adopted a child.

The couple argue that it is the Singaporean government’s fault that the authorities conducted a thorough investigation of them when Marcus was approved for adoption.

“To see if this is legal, (authorities) are experts in this. They handle many adoptions every day. We are not,” Ali said.

MSF does not carry out any checks on children brought into Singapore and declined to answer the BBC’s questions about how it processes foreign adoptions.

He pointed to earlier statements that he was supporting the affected parents and that there were “some delays” in processing their children’s citizenship applications.

The ministry also promised to review adoption procedures.