Man Who Believed He Was Adopted By U.S. Citizen May Be Deported

I am intrigued by this case of a 24-year-old adopted by a U.S. citizen who may be deported.  Apparently, the adoption was not legal or something went wrong in the process.  The 24-year-old was arrested after a DUI incident and discovered through Immigration and Customs Enforcement (ICE) that he had no immigration status.  The man’s mother believed that her father had legally adopted him in the Philippines.  I wonder what went wrong.  I don’t know the facts of this particular case.  Intercountry adoption is also complicated, especially since the U.S. ratified the Hague Convention in April 2008.