Illegal Immigrant Fights for Custody of Young Son

Feb. 28, 2012 — -- A custody battle between a Guatemalan mother who was arrested while in the U.S. illegally and the couple who adopted her son while she was in prison and raised him for most of his life is back in court today.

Guatemalan-born Encarnacion Bail Romero, who entered the U.S. illegally in 2006 while pregnant with her son and later gave birth, was in Missouri in May 2007 when Immigration and Customs Enforcement officers raided the poultry processing plant where she worked. Romero was arrested, along with about 100 other undocumented workers. Romero's son, Carlos, was 7 months old at the time.

WATCH 'Nightline' Investigation: Stolen Babies? Children Caught in a Tug-of-War

Bail Romero went to jail and a few months later Carlos was transferred to the custody of Melinda and Seth Moser of Carthage, Mo., who later officially adopted the boy and raised him as their own.

But after Bail Romero got out of prison in 2009, she said she took up a long battle to get her son back, even though she hasn't seen the boy in more than four years.

"I'm the mother of Carlitos and I need for him to be with me soon," Bail Romero said in a previous ABC News interview.

The Missouri couple, who call the boy Jamison, said he is their son and they're the only parents the child has known since he was a baby.

"I could not love him more, had he come out of me physically," Melinda Moser told a Missouri television station. "I can only imagine the trauma that he would go through in feeling like people that did love him have betrayed him, you know?"

PHOTOS: Tug-of-Love -- Kids Taken from Moms

Both sides will make their case before Judge David Jones who will determine Bail Romero's parental rights and potentially oversee an adoption proceeding in a trial that is expected to last through Friday.

Bail Romero was charged by the federal government with aggravated identity theft, to which she pleaded guilty in October 2007. She was sentenced to two years in prison and ordered to be deported when released. Her deportation order has been put on hold pending the outcome of the custody trial.

After a Missouri circuit court judge terminated Bail Romero's parental rights in 2008, the case was kicked up to the Missouri Supreme Court where the case was called a "travesty of justice." That court reversed the decision and sent the case back to the lower court for a retrial.

Missouri Circuit Court Judge David Dally, who originally terminated the parental rights, wrote in his 2008 judgment, "Illegally smuggling herself into the country is not a lifestyle that can provide any stability for the child."

"Obviously, I thought the judgment was fair when I issued the judgment, yes," he told ABC News previously. The attorneys for Bail Romero and the Mosers also declined to comment about the trial for this story.

Attorney Richard Schnake, who represented the Mosers in Missouri Supreme Court, said Bail Romero lost her parental rights not because she was in the country illegally, but because she abandoned her child.

"The case is not about her status in this country as an illegal alien," he said. "She did not try to maintain any sort of relationship with her child. The trial court terminated her parental rights because she abandoned her child, not because she's illegal and not because she went to jail. If she had maintained involvement in the child's life, she would not have had her parental rights terminated."

The opinion released by the Supreme Court in 2011 supports Schnake's claims: "After her arrest and incarceration, the evidence at trial showed no involvement by Mother in Child's life...From October 3, 2007, when they took custody to the date of trial, the Adoptive Parents have provided all care for Child. No one, including Mother or her family, has contacted them to inquire about Child or offered assistance with Child, even though Mother had their name and address from the time she was served with the petition on October 16, 2007."

The opinion states that the adoptive parents sent two letters to Bail Romero in jail, one of which was refused.

Bail Romero has said that she attempted to get her son back after she got out of prison in 2009 but "nobody could help me because I don't speak English."