(CNN) -- A Texas woman has been arrested as a suspect in an alleged kidnapping of a boy eight years ago, the San Augustine County Sheriff's Office said Wednesday. The woman, Krystle Tanner of San Augustine, was the godmother of Miguel Antonio Morin, who was 8 months old when he and Tanner went missing, the boy's mother, Auboni Champion-Morin, told CNN Wednesday. Tanner, also a neighbor, had been babysitting the boy in her Houston home, she said. San Augustine is about 165 miles northeast of Houston. The boy, now 8, was in good physical condition Monday and was in the custody of Texas Child Protective Services, said sheriff's Chief Deputy Gary Cunningham.
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NEW: Houston police are looking at why an Amber Alert was never issued in 2004 case
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Krystle Tanner of San Augustine, Texas, is in custody in the alleged kidnapping
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She was the boy's godmother, the mother tells CNN
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The boy, now 8, was 8 months old when he and Tanner went missing in 2004, mom says
Auboni Champion-Morin
In an interview Wednesday, @placeholder expressed joy and disbelief that Miguel, the youngest of her five children at the time of his disappearance, had been finally found.
Miguel Antonio Morin
In an interview Wednesday, Champion-Morin expressed joy and disbelief that @placeholder, the youngest of her five children at the time of his disappearance, had been finally found.
Texas
Texas
The child protection agency told Champion-Morin that Tanner had been arrested in east @placeholder, but that her son was not with Tanner at the time, the mother said.
Auboni Champion-Morin
@placeholder will undergo a blood test possibly this week to prove she is the biological mother, she said.
Tanner
Tanner
Tanner
Tanner and the mother lived in the same apartment building, and @placeholder wanted the boy to stay in her apartment and the other kids to stay at another friend's apartment, the mother said.
Miguel Antonio Morin
She explained @placeholder's disappearance to his siblings "the best I could," she said.