Paul Sanfilippo, 38, a former Stockton Sunday school teacher who was arrested last week by local police and federal agents on suspicion of receiving and distributing child pornography throughout the United States and other countries, entered a not-guilty plea Monday during his arraignment in federal district court in Sacramento.

Sanfilippo was ordered to remain in custody after the judge found him to be a flight risk and a danger. He had been free on bail and awaiting trial following his arrest in September on suspicion of contacting a 13-year-old girl for the purpose of lewd and lascivious conduct and possession of child pornography.  

Sanfilippo faces up to $250,000 in fines and 20 years in prison if convicted.