Rebecca Yandoli was found gambling on the main floor of the Wind Creek Casino after the toddler went looking for her around 4 a.m. Saturday, police said.
Yandoli, who records show has lived in Annandale and Stewartsville, told police she left the girl in the room at 1:15 a.m. before she left to gamble.
Yandoli was arrested and charged with child endangerment. She was being held in the Northampton County Prison on $10,000 bail.
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