BOSTON (CBS) — A pediatric endocrinologist from Children’s Hospital has pleaded guilty to three counts of owning child pornography.

Dr. Richard Keller faces more than six years in prison, at his sentencing in February.

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In September 2012, the U.S. Attorney’s office said Keller purchased and ordered over 50 DVDs of child pornography online.

Investigators also found more than 500 photographs and between 60 – 100 DVDs inside Keller’s home.

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He’s been placed on administrative leave from Children’s Hospital.

He also served as Medical Director at Phillips Academy for 19 years and taught classes at Harvard.

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