Newtown Police

David Csanadi, 36, sexually abused three female children of friends and kept videos of their ordeals at his home in Newtown, Connecticut.

A federal judge sentenced a Connecticut man to 20 years in prison for sexually abusing a toddler and two other young girls and videotaping the abuse.

Between 2006 and 2009, David Csanadi, 36, of Newtown, sexually abused the three female children of friends and kept the tapes at his home in Newtown, according to court.

Csanadi was charged with three counts of production of child pornography and one count of possession of child pornography. 

He pleaded guilty in November to one count of production of child pornography.

'Unspeakable crimes'
One victim was approximately 18 months old, another was 4-and-a-half years old at the time of the abuse and the third was identified as being under the age of 12, according to the U.S. Attorney, District of Connecticut.

"The sexual abuse of children and production of child pornography are detestable crimes, and the harsh reality of it all is that those who commit these unspeakable crimes live and work among us," said Kimberly Mertz, FBI Special Agent in Charge of the New Haven Division.

"The Connecticut Child Exploitation Task Force's devotion to identifying those who commit these monstrous crimes and to bringing them to justice remains, and always will remain, resolute.”

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According to prosecutors, the abuse happened in his home in Newtown and in Rhode Island.

Csanadi has been detained in state custody since April 15, 2011, when he was arrested on three counts of first-degree sexual assault, three counts of risk of injury or impairing the morals of children, three counts of illegal sexual contact with a child, and one count of third-degree possession of child pornography.

Upon his release, Csanadi will be subject to 15 years of supervised release. He will be sentenced on state sexual abuse charges in April.

NBCConnecticut.com