(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
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.