TUCSON, Ariz. -- Polly Klaas. Elizabeth Smart. Megan Kanka. The names are synonymous with a parent's worst nightmare: a child snatched by a stranger from the safety of her own home.
Now, police in Tucson, Ariz., are trying to determine what happened to 6-year-old Isabel Mercedes Celis. Her parents say they awoke on Saturday to find her missing. Police said a window was open with the screen pushed aside.
While officers are investigating all possibilities in her disappearance, experts say, abduction from the home is relatively rare, with just over 18 children taken each year.
