Family photo.

Nathaniel Rivera was in agony when his mother picked him up from daycare.

ARLINGTON - State investigators say a North Texas daycare worker injured an infant in the daycare's care.

So why did the baby's parents have to fight to keep him?

The Rivera family's story could become almost anyone's.

Nathaniel Rivera's biggest problem on the morning of April 18th last year, was congestion.

By evening, when Heather Rivera picked her son up, he was in agony.

"Whenever I picked him up he was screaming at the top of his lungs and I couldn't fix the problem."

Emergency room doctors diagnosed a severely broken arm and called Child Protective Services to investigate.

"They were accusing us of breaking Nathaniel's arm," said his mother.

CPS investigators said Nathaniel could only stay with his parents if they accepted 24-hour, live-in chaperones.

"We couldn't be alone with Nathaniel at all," said Rivera.

One month later, the department of family and protective services cleared the Riveras and found the daycare, Primrose School of North East Green Oaks, in violation of state standards saying investigators concluded there was reason to believe a daycare worker abused the child.

"It happened there and they're accusing us," said Rivera.

We went to the daycare's owner for their side of the story - he told us they disagree with the state's findings.

"I don't want to say anything other than that the matter in under appeal and investigation," he said.

He did tell us, however, that the worker in question has left the daycare for unrelated reasons.

Though the investigation has moved past the Riveras, they can't seem to move past this ordeal. Afraid now of daycares, Heather quit her daytime job in management - she is now a cashier at Wal-Mart.

She is suing the daycare, hoping to find the money to build the better life they planned and the answers they have yet to get.