PHILADELPHIA — A former assistant commissioner with the New York City Probation Department who lived in Pennsylvania was sentenced to nearly 13 years in prison after he admitted he received and possessed child pornography.

A federal judge on Monday also ordered lifetime supervised release for Robert Costello, 54, of Bethlehem, Pa.

Costello pleaded guilty in March to receipt of child pornography, access with intent to view child pornography and possession of child pornography.

Costello admitted receiving sexually explicit images of children over the internet and possessing thousands of sexually explicit images and videos of children while he was employed by the probation department.

He was terminated from his job last year.